H. Shawky, N. Ezz-Eldin, W. Tawakkol, M. El-Hariri, M. Kotb, and M. Refai,  " Isolation and identification of Cryptococcus neoformans from bird droppings, with special reference to newly formulated differential media   based on development of brow",  J.Egypt.Vet.Med.Assoc. , vol. 66 , pp. 165-179. , 2006.