References:
1 Fayziyeva Dilsora Salimovna, Islomov Shahboz Zokir ugli, Yuldasheva N.S.,2019 International Conference on Information Science and Communications Technologies (ICISCT) https://www.researchgate.net/publication/339562121_Security_issues_in_E-Learning_system
2 Kuznetsova T.I. RISK: Resursy, informatsiya, snabzhenie, konkurentsiya — RISC: Resources, Information, Supply, Competition, 2015, no. 2, pp. 177–180.
3 Lavrushin O.I., ed. Dengi, kredit, banki[Money, credit, banks]. Moscow, KNORUS Publ., 2016, 448 p.
4 Kochergin D.A. Elektronnye dengi[Electronic money]. Moscow, Market DS Publ., 2011, 424 p.