Mohammadi, S., Khalil Agdam, N., Khoshnejad, A., Pour Yousef, M., Jalilnejad, N. (2013). Mixed-cropping and Its Effects on Yield and Agronomical Traits of Barley (Hordeum vulgar L.) and Bersim Clover (Trifolium alexanderium L.). *Journal of Crop Ecophysiology*, 7(26), 229-240.