Ayasan T, Ozcan BD, Baylan M, Canogullari S. The Effects of Dietary Inclusion of Probiotic Protexin on Egg Yield Parameters of Japanese Quails (Coturnix coturnix Japonica). Int. J. Poult. Sci. 2006;5(8):776–779. doi:10.3923/ijps.2006.776.779