MOMEU, L., A. M. CIORCA, O. TÜNDE LÁSZLÓ, C. SEGEDI, K. P. BATTES, and M. CÎMPEAN. “The Karstic Lake Iezerul Ighiel (Transylvania, Romania): Its First Limnological Study”. Studia Universitatis Babeș-Bolyai Biologia, vol. 60, no. 2, Dec. 2015, pp. 39-60, http://193.231.18.162/index.php/subbbiologia/article/view/4591.