Daffalla, Ahmed E., 		Lazim, M.E., 		Farah, S.M., AND 		Ahmed, E.A..
" Effects of sowing date and skipping of irrigation on growth, yield, and  yield components of winter grown sunflower (Helianthus annuus L.)" <em>Gezira Journal of Agricultural Science</em> [Online], Volume 11 Number 1 (1 January 2013)