???????, ????-????. "????????? ??????????? ? ?????? ? ????????? ???-??????" Connections: The Quarterly Journal 16, no. 1 (2017): 57-70.

Milina, Velichka. "???????????? ? ???????????????? ????????: ??????????? ? ??????." Connections: The Quarterly Journal 11, no. 2 (2012): 63-79.