Ibekwe, V.I., P.I. Azubuike, E.U. Ezeji, and E.C. Chinakwe. 2008. “Effects of Nutrient Sources and Environmental Factors on the Cultivation and Yield of Oyster Mushroom (Pleurotus Ostreatus)”. Pakistan Journal of Nutrition 7 (2): 349–351. https://doi.org/10.3923/pjn.2008.349.351.