E. Abdalla, Tag Elsir, 		M. Elmustafa, Ahmed, AND 		A. Mubarak, Hassan.
" Establishment and parasitism efficiency of Trichogramma principium (Sugonyaev et Sorokina) on Helicoverpa armigera (Hb.) infesting cotton in Sudan" <em>Gezira Journal of Agricultural Science</em> [Online], Volume 10 Number 1 (10 January 2023)