Ratchev, Valeri. ????????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ??????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.

Ratchev, Valeri. ????? ????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ???????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.