1. Bassett MJ, editor. 1986. Breeding vegetable crops. Westport (CT): AVI; p. 397.
2. Crosson P. 1995. Future supplies of land and water for world agriculture. In: Islam N, editor. Population and food in the early 21st century: meeting future food demand of an increasing world population. Occasional Paper. Washington (DC): International Food Policy Research Institute (IFPRI); p. 143–160.