Technical efficiency of hybrid maize growers: A stochastic frontier model approach
Imad Ali, HUO Xue-xi, Imran Khan, Hashmat Ali, Khan Baz, Sufyan Ullah Khan
Journal of Integrative Agriculture . 2019, (10): 2408 -2421 .  DOI: 10.1016/S2095-3119(19)62743-7