Zeng, G.M., J. Zhou, T. Huang, S.Y. Liu, F.F. Ji, and P. Wang. 2014. “Extraction of Chlorophyll-a from Eutrophic Water by Repeated Freezing and Thawing-Extraction Method”. Asian Journal of Chemistry 26 (8):2289-92. https://doi.org/10.14233/ajchem.2014.15700.