CHAKRABARTY, S K; SHARMA, S P. Foraging behaviour of honeybees in hybrid seed production of sunflower (Helianthus annuus)*. The Indian Journal of Agricultural Sciences, Delhi, India, v. 77, n. 9, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/3211. Acesso em: 27 oct. 2025.