Tsola, Stephania L., et al. “Size-Fractionated Chlorophyll a and Phycocyanin Temporal Variations in a Highly Eutrophic Lake and Its Isolated Karstic Springs”. Oceanological and Hydrobiological Studies, vol. 47, no. 2, June 2018, pp. 118-27, https://czasopisma.bg.ug.edu.pl/index.php/oandhs/article/view/8616.