Abdul Rahim Thaha, Asrul1,Halmia Umrah. The Biofertilizer Formulation from Coconut Fiber Waste and Oyster Mushroom Waste as Basic Substrate, the Active Agent of Aspergillussp. International Journal of Advanced Science and Technology, v. 29, n. 05, p. 8601-8610, 27 May 2020.