Keneni, A., and G. Kebede. “Growth, Yield, and Biological Efficiency of Oyster Mushroom (Pleurotus Ostreatus) Grown on Different Substrate Mix Ratios”. Journal of Science and Sustainable Development, vol. 4, no. 2, July 2016, pp. 103-17, doi:10.20372/au.jssd.4.2.2016.063.