Sustainable production of barley and wheat by intercropping common vetch A.S. Lithourgidis, K.V. Dhima, I.B. Vasilakoglou, C.A. Dordas and M.D. YiakoulakiAgron. Sustain. Dev., 27 2 (2007) 95-99DOI: https://doi.org/10.1051/agro:2006033