Okolie, O. C., H. O. Stanley, F.-P. N., and C. J. Ugboma. “The Production of Liquid Biofertilizer from Cassava Peels and Spent Mushroom Substrates Using Microbial Inoculants”. Asian Journal of Biotechnology and Bioresource Technology, Vol. 4, no. 3, Jan. 2019, pp. 1-13, doi:10.9734/AJB2T/2018/45642.