Tsvetelina Batsalova, Dzhemal Moten, Diyana Basheva, Ivanka Teneva, and Balik Dzhambazov, “In Vitro Cytotoxicity and Antioxidative Potential of Nostoc Microscopicum (Nostocales, Cyanobacteria)”, TFM, vol. 1, no. 1, pp. 9–17, Aug. 2016.