Vasileva, I. A., J. G. Ivanova, and L. G. Gigova. “Selection of Nitrogen Source Affects the Growth and Metabolic Enzyme Activities of Chlorella Vulgaris (Beijerinck) Strain R-06/2 (Chlorophyta)”. Archives of Biological Sciences, vol. 72, no. 2, July 2020, pp. 291-00, https://www.serbiosoc.org.rs/arch/index.php/abs/article/view/5101.