???????, ??????. ???????????? ???????? ?? ????????? ????????: ???????? ?????? In ?????????? ?? ??????????? ? ?????????. Vol. 7. ?????: ??????, 2020.

???????, ??????. ?????????? ?? ?????????? ?? ???????????? ??????????? In ?????????? ?? ??????????? ? ?????????. Vol. 8. ?????: ??????, 2020.

Tagarev, Todor, Petya Ivanova, and Nataly Ivanova. ????????: ???????????, ???????????, ???????? ? ??????????????? ?? ?????????? ?? ????? ? ????????? ??? ???????? In IT4Sec Reports. ?????: ???????? ?? ????????????? ? ?????????????? ??????????, 2015.

Ratchev, Valeri. ????????? ?????? ?? ??????????? ?? ????????? 2014: ????? ????? ? ????? ??????????? ????? In CSDM Views. ?????: ?????? ?? ?????????? ?? ??????????? ? ?????????, 2015.

Ratchev, Valeri. ?????????????? ?? ??? ?? ????: ???????? ?????? ??-????? In CSDM Views. ?????: ?????? ?? ?????????? ?? ??????????? ? ?????????, 2014.