SINGH, K M; AHMAD, NASIM; SINHA, D K; KUMAR, ABHAY; SINGH, R K P. Cost efficiency of principal crops in Bihar (India) – A stochastic frontier approach. The Indian Journal of Agricultural Sciences, Delhi, India, v. 90, n. 8, p. 1445–1452, 2020. DOI: 10.56093/ijas.v90i8.105940. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/105940.. Acesso em: 20 may. 2024.