SINGH, S P; SHUKLA, Sudhir; KHANNA, K R. Diallel analysis for combining ability in opium poppy (Papaver somniferum). The Indian Journal of Agricultural Sciences, Delhi, India, v. 65, n. 4, 2012. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/18221. Acesso em: 26 oct. 2025.