H. Ukoima, L. Ogbonnaya, G. Arikpo, and F. Ikpe, “Cultivation of Mushroom (Volvariella volvacea) on Various Farm Wastes in Obubra Local Government of Cross River State, Nigeria”, Pak. J. Nutr., vol. 8, no. 7, pp. 1059–1061, Jun. 2009, doi: 10.3923/pjn.2009.1059.1061.