MENSI, Fethi, et al. “Optimizing R-Phycoerythrin Purification from the Red Algae Gracilaria Verrucosa in Polymer-Salt Aqueous Two-Phase System Using Response Surface Methodology”. INSTM Bulletin : Marine and Freshwater Sciences, vol. 41, Feb. 2014, pp. 63-76, doi:10.71754/instm.bulletin.v41.310.