“Cultivation of Phaffia Rhodozyma (Xanthophyllomyces Dendrorhous) Yeast in Discontinuous System to Obtain Astaxanthin”. Revista Brasileira De Ciências Farmacêuticas, vol. 38, no. 4, Dec. 2002, pp. 457-62, https://doi.org/10.1590/S1516-93322002000400008.