Margarita Lugioyo, G., Loza, S. and C. Abreu, P. 2007. Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters. Revista de Biología Tropical. 55, 2 (Jun. 2007), 449–457. DOI:https://doi.org/10.15517/rbt.v55i2.6024.