H. ESKANDARI and A. GHANBARI, “Intercropping of Maize (Zea mays) and Cowpea (Vigna sinensis) as Whole-Crop Forage: Effect of Different Planting Pattern on Total Dry Matter Production and Maize Forage Quality”, Not Bot Horti Agrobo, vol. 37, no. 2, pp. 152–155, Nov. 2009.