Onejeme, F. C., E. O. Okporie, and C. E. Eze. “Combining Ability and Heterosis in Diallel Analysis of Maize (Zea Mays L.) Lines”. International Annals of Science, vol. 9, no. 1, July 2020, pp. 188-00, doi:10.21467/ias.9.1.188-200.