Sapkarev, Jonče. “Earthworms (Lumbricidae) and Leches (Hirudinea) from Neighbouring Mountains Galichica and Petrino”. Macedonian Journal of Ecology and Environment 7, no. 1-2 (December 31, 2001): 7–13. Accessed January 24, 2025. http://mail.mjee.org.mk/index.php/mjee/article/view/147.