N. Thi Dong Phuong, L. T. Van Anh, L. Thi Dieu Huong, and P. Thi My Yen, “Extraction of polysaccharide from Spirulina platensis - advantage of freeze-thaw method”, Vietnam J. Biotechnol., vol. 18, no. 4, pp. 693–699, May 2021.