Spasov, Filip, and Todor Tagarev. ?????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ??????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.

Petkov, Vesselin, and Todor Tagarev. ?????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ??????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.

Ratchev, Valeri, Todor Tagarev, and Zlatogor Minchev. ???????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ??????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.

Petkov, Veselin, and Todor Tagarev. ???????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ??????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.