Tamm, G.O. and Foster, R.K. 2001. Effect of intercropping wheat with forage legumes on wheat production and ground cover. Pesquisa Agropecuaria Brasileira. 36, 3 (Mar. 2001), 465–471. DOI:https://doi.org/10.1590/S1678-3921.pab2001.v36.6153.