?????????, ????????. ???????????? ?? ????? ????????? ?? ????? ?? ???????? ?? COVID-19. ????? ???????? In IT4Sec Reports. Vol. 136., 2020.

Georgiev, Venelin. ?????? ?? ??????????? ?? ??????? ?? ???????????? ???????? ?? ????? ?? ???????? ?? ??????????? In IT4Sec Reports., 2020.