Sesay, A., and C. Magagula. “Effect of Sowing Date on Bambara Groundnut (<i>Vigna Subterranea L</I>) Yield and Yield Components in Swaziland”. UNISWA Research Journal of Agriculture, Science and Technology, vol. 9, no. 1, Sept. 2007, pp. 68-76, doi:10.4314/uniswa-rjast.v9i1.4765.