Rosley, Rozainita, et al. “Enzymatic Esterification of River Catfish (Mystus Nemurus) Fatty Acids to Enrich W-3 Polyunsaturated Fatty Acids”. Asian Journal of Chemistry, vol. 24, no. 6, Feb. 2012, pp. 2679-84, https://asianpubs.org/index.php/ajchem/article/view/9200.