1. Effect of intercropping safflower with faba bean on their productivity and land use efficiency;Abdel-Aal;Egypt. J. Agron.,1991
2. Baumgartner, D.U., de Baan, L., Nemecek, T., 2008. European grain legumes – environment-friendly animal feed? Life cycle assessment of pork, chicken meat, egg and milk production. Grain Legumes Integrated Project. Report. Agroscope Reckenholz-Tänikon Research Station ART, Zürich, p. 106.
3. Effects of plant density on intercropped wheat and field beans in an organic farming system;Bulson;J. Agric. Sci.,1997
4. Nitrogen, weeds and water as yield-limiting factors in conventional, low-input, and organic tomato systems;Clark;Agric. Ecosyst. Environ.,1999