Madu, J. O., R. E. Okonji, N. Torimiro, and F. K. Agboola. “Purification and Characterization of Pectinase from Bacillus Licheniformis Obtained from a Cassava Waste Dump”. JOURNAL OF ADVANCES IN BIOLOGY, vol. 8, no. 3, Jan. 2016, pp. 1685-9, doi:10.24297/jab.v8i3.4552.