Beissinger, Margaret H. “Martha Forsyth, Slushaĩ Shterko, I Dobre Zampomni . Pecnite I Zhivota Na Linka Gekova Gergova Ot Selo Bistritsa Sofiĩsko”. FOLKLORICA - Journal of the Slavic, East European, and Eurasian Folklore Association, vol. 5, no. 2, Nov. 2001, https://doi.org/10.17161/folklorica.v5i2.3661.