SINGH, MAHENDRA; CHAND, PURAN. Economic efficiency of rice (Oryza sativa) cultivation in northern urban India. The Indian Journal of Agricultural Sciences, Delhi, India, v. 81, n. 7, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/7386. Acesso em: 23 oct. 2025.