References:

Acheson, A. (2018). What Can You Buy with Bitcoin? Coindesk. Retrieved December 17, 2019, from https://www.coindesk.com/information/what-can-you-buy-with-bitcoins/
Antonopoulos, A. M. (2015). Mastering bitcoin. Sebastopol, CA: O'Reilly. 
Back, A. (1997). A partial hash collision based postage scheme. Retrieved December 17, 2019, from http://www.hashcash.org/papers/announce.txt
Back, A. (2002). Hashcash - A Denial of Service Counter-Measure. Retrieved December 17, 2019, from http://www.hashcash.org/papers/hashcash.pdf
Ban, Z. (2018). Analysis of bitcoin advertisements. Diploma Thesis. Prague: VSFS.
Ban, Z., Lansky, J., Mildeova, S., & Tesar, P. (2018). Using cryptocurrency to buy and sell products online. In: Proceedings of the 26th EBES conference - Prague program and Abstract book. Istanbul: EBES.
Barone, R., & Masciandaro, D. (2019). Cryptocurrency or usury? Crime and alternative money laundering techniques. European Journal of Law and Economics, 47(2), 233-254. doi: 10.1007/s10657-019-09609-6
Basl, J., & Doucek, P. (2019). A Metamodel for Evaluating Enterprise Readiness in the Context of Industry 4.0. Information, 10(3), no. 89. doi: 10.3390/info10030089 
Bitpay. (2018). Bitpay. Retrieved December 17, 2019, from https://bitpay.com/
BitPay. (2017). BitPay’s Bitcoin Payments Volume Grows by 328%, On Pace for $1 Billion Yearly. Retrieved December 17, 2019, from https://blog.bitpay.com/bitpay-growth-2017/
Ciaian, P., Rajcaniova, M., & Kancs, d’A. (2016). The economics of BitCoin price formation. Applied Economics, 48(19), 1799-1815. doi: 10.1080/00036846.2015.1109038
Conrad, C., Custovic, A., & Ghysels, E. (2018). Long-and Short-Term Cryptocurrency Volatility Components: A GARCH-MIDAS Analysis. Journal of Risk and Financial Management, 11(2), no. 23. doi: 10.3390/jrfm11020023
Cryptocurrency Market Capitalizations. (2019). CoinMarketCap. Retrieved December 17, 2019, from https://coinmarketcap.com
Demieva, A. G. (2018). Cryptocurrency in Russia: Problems of Legal Regulation. Ad Alta, 8(1), 95-97.
Dostov, V., & Shust, P. (2014). Cryptocurrencies: an unconventional challenge to the AML/CFT regulators? Journal of Financial Crime, 21(3), 249-263. doi: 10.1108/JFC-06-2013-0043
Dwyer, G. P. (2015). The economics of Bitcoin and similar private digital currencies. Journal of Financial Stability, 17, 81-91. doi: 10.2139/ssrn.2434628
Dyhrberg, A. H. (2016). Bitcoin, gold and the dollar – A GARCH volatility analysis. Finance Research Letters, 16, 85-92. doi: 10.1016/j.frl.2015.10.008
European Banking Authority. (2014). EBA Opinion on virtual currencies. EBA/Op/2014/08. Retrieved December 17, 2019, from https://www.eba.europa.eu/documents/10180/657547/EBA-Op-2014-08+Opinion+on+Virtual+Currencies.pdf
Eurostat Statistics explained. (2017). E-commerce statistics for individuals. Retrieved December 17, 2019, from http://ec.europa.eu/eurostat/statistics-explained/index.php/E-commerce_statistics_for_individuals
Eurostat Statistics explained. (2018). E-commerce statistics for individuals. Retrieved December 17, 2019, from https://ec.europa.eu/eurostat/statistics-explained/index.php/E-commerce_statistics_for_individuals
Foley, S., Karlsen, J. R., & Putniņš, T. J. (2019). Sex, Drugs, and Bitcoin: How Much Illegal Activity Is Financed through Cryptocurrencies? Review of Financial Studies, 32(5), 1798-1853. doi: 10.1093/rfs/hhz015
Greenberg, P., & Bugden, D. (2019). Energy consumption boomtowns in the United States: Community responses to a cryptocurrency boom. Energy Research & Social Science, 50, 162-167.
Haber, S., & Stornetta, W. S. (1991). How to time-stamp a digital document. Journal of Cryptology, 3(2), 99-111. doi: 10.1007/BF00196791
Han, J., & Kamber, M. (2006). Data mining: concepts and techniques. 2nd ed. San Francisco, CA: Morgan Kaufmann.
Helisek, M. (2002). The Causes of Currency Crises - Theory and Practice. Czech Journal of Economics and Finance, 52(9), 458-477. 
Chaum, D. (1983). Blind signatures for untraceable payments. In: Chaum D., Rivest R.L., & Sherman A.T. (Eds.), Advances in Cryptology (pp. 199-203). Boston: Springer. doi: 10.1007/978-1-4757-0602-4_18
Cheah, E.T., & Fry, J. (2015). Speculative bubbles in Bitcoin markets? An empirical investigation into the fundamental value of Bitcoin. Finance Research Letters, 130, 32-36. doi: 10.1016/j.econlet.2015.02.029
Chokun, J. (2016). Who Accepts Bitcoins as Payment List of Companies. Retrieved December 17, 2019, from https://99bitcoins.com/bitcoin/who-accepts/
Jansen, B. J., Sobel, K., & Zhang, M. (2011). The Brand Effect of Key Phrases and Advertisements in Sponsored Search. International Journal of Electronic Commerce, 16(1), 77-106. doi: 10.2753/JEC1086-4415160103
Lansky, J. (2017). Bitcoin System. Acta Informatica Pragensia, 6(1), 20-31. doi: 10.18267/j.aip.97
Lansky, J. (2018). Cryptocurrencies. Prague: C. H. Beck.
Lansky, J. (2020). Cryptocurrency Survival Analysis. Journal of Alternative Investments, (in press). doi: 10.3905/jai.2019.1.084
Lecky-Thompson, E., & Nowicki, S. D. (2010). PHP 6: programujeme profesionalne. Brno: Computer Press.
Knirsch, F., Unterweger, A., & Engel, D. (2019). Implementing a blockchain from scratch: why, how, and what we learned. EURASIP Journal on Information Security, 2019(2), no. 2. doi: 10.1186/s13635-019-0085-3
Lee, D. (2015). Handbook of digital currency: bitcoin, innovation, financial instruments, and big data. Amsterdam: Elsevier/AP.
Mares, D., & Dlaskova, G. (2016). Small and Medium-Sized Enterprizes - Opportunities and Challenges. European Research Studies Journal, 19(4), 78–87. doi: 10.35808/ersj/582
McHugh, D. (2019). Facebook's Libra Gets Stark Warning From G-7 Finance Chiefs. The New York Times. July 18. 
Mildeova, S., & Brixi, R. (2011). The Limits of ICT for Innovations and Economic Growth. In: Proceedings of the 19th Interdisciplinary Information Management Talks (pp. 157-164). Linz: Trauner Verlag. 
Nakamoto, S. (2008). Bitcoin: A Peer-to-Peer Electronic Cash System. Retrieved December 17, 2019, from https://bitcoin.org/bitcoin.pdf
Narayanan, A. (2016). Bitcoin and cryptocurrency technologies: a comprehensive introduction. Princeton: Princeton University Press. 
Nova, A. (2018). Bitcoin takes on cash, as more places accept the cryptocurrency. CNBC. Retrieved December 17, 2019, from https://www.cnbc.com/2018/03/02/spending-cryptocurrencies-on-everyday-purchases-is-getting-easier.html
Nulicek, V. (2018). Interconnection between IPv4 and IPv6. Acta Informatica Pragensia, 7(1), 22-39. doi: 10.18267/j.aip.112 
Number of Bitcoin ATMs. (2018). Number of Bitcoin ATMs worldwide from January 2016 to March 2018. Statista. Retrieved December 17, 2019, from https://www.statista.com/statistics/343127/number-bitcoin-atms/
Popper, N. (2015). Digital Gold: Bitcoin and the Inside Story of the Misfits and Millionaires Trying to Reinvent Money. New York: Harper. 
Roubal, O. (2017) Janus' face of consumer culture. European Journal of Science and Theology, 13(6), 219-229. 
Russo, C. (2018). Bitcoin Speculators, Not Drug Dealers, Dominate Crypto Use Now. Bloomberg. Retrieved December 17, 2019, from https://www.bloomberg.com/news/articles/2018-08-07/bitcoin-speculators-not-drug-dealers-dominate-crypto-use-now
Saltz, J. S., & Stanton, J. M. (2018). An introduction to data science. Los Angeles: SAGE.
Simek, P., Stoces, M., Vanek, J., Jarolimek, J., Masner, J., & Hrbek, I. (2013). Using of Automatic Metadata Providing. Agris on-line Papers in Economics and Informatics, 5(4), 189-197. doi: 10.22004/ag.econ.162301
Smutny, Z. & Vehovar, V. (2020). Social Informatics Research: Schools of Thought, Methodological Basis, and Thematic Conceptualization. Journal of the Association for Information Science and Technology, (in press). doi: 10.1002/asi.24280
Statista. (2018). Statista – The Statistics Portal. Retrieved December 17, 2019, from https://www.statista.com/statistics/237974/online-advertising-spending-worldwide/ 
Stieglitz, S., Mirbabaie, M., Ross, B., & Neuberger, C. (2018). Social media analytics – Challenges in topic discovery, data collection, and data preparation. International Journal of Information Management, 39, 156-168. doi: 10.1016/j.ijinfomgt.2017.12.002
Svec V., & Selby R. (2019). Encourage them to learn: Case Study of Fictitious Product and Virtual Market in Marketing Communications Degree Course. Journal on Efficiency and Responsibility in Education and Science, 12(3), 66-74, doi: 10.7160/eriesj.2019.120301
Witten, I. H., Frank, E., Hall, M., & Pal, C. (2016). Data mining: practical machine learning tools and techniques. 4nd ed. San Francisco, CA: Morgan Kaufman. 
Wolfson, S. N. (2015). Bitcoin: The Early Market. Journal of Business & Economics Research, 13(4), 201-214 doi: 10.19030/jber.v13i4.9452
Zhang, M. (2008). EUIRMSI: One Kind of Software Infrastructure for Enterprise Unstructured Information Resources Management System Development. In: International Symposium on Information Science and Engineering (pp. 345-349). New York: IEEE. doi: 10.1109/ISISE.2008.130