Effects of replacing soybean meal with pumpkin seed cake and dried distillers grains with solubles on milk performance and antioxidant functions in dairy cows oleh Y. Li, G.N. Zhang, X.P. Fang, C. Zhao, H.Y. Wu, Y.X. Lan, L. Che, Y.K. Sun, J.Y. Lv, Y.G. Zhang, C.F. Pan