A. M. M. Al-Naggar, R. Shabana, M. S. Hassanein, T. A. Elewa, A. S. M. Younis & A. M. A. Metwally. The Effect of Increasing Plant Density on Performance and Heterobeltiosis in Maize Testcrosses Among 23 Inbreds and Three Testers. Arch. Curr. Res. Int. 2017, 8, 1–14.