GAMAYINA, D. J.; ALIYU, A.; SHELLENG, B.; HADDABI, A. TECHNICAL EFFICIENCY OF COWPEA MARKETING IN MUBI NORTH. International Journal of Engineering Technologies and Management Research, [S. l.], v. 7, n. 2, p. 81–102, 2020. DOI: 10.29121/ijetmr.v7.i2.2020.541. Disponível em: https://www.granthaalayahpublication.org/ijetmr-ojms/ijetmr/article/view/IJETMR20_A01_2016. Acesso em: 16 aug. 2022.