Abdala-Diaz, R T, et al. “Effect of Porphyridium Cruentum Polysaccharides on the Activity of Murine Macrophage Cell Line RAW 264.7”. Ciencias Marinas, vol. 36, no. 4, Aug. 2010, pp. 345-53, doi:10.7773/cm.v36i4.1732.