RANI, Rekha; SINGH, H. N. A Comparative Study of Technical Efficiency of Rice Production in Irrigated and Rainfed Environment of Uttrakhand. Indian Journal of Hill Farming, India, v. 28, n. 2, 2016. Disponível em: https://epubs.icar.org.in/index.php/IJHF/article/view/54805. Acesso em: 27 oct. 2025.