KHATKAR, M S; S SANDHU, J; BRAH, G S; CHAUDHARY, M L. Evaluation of selection based on specific gravity and egg weight for improvement of shell thickness in layer chicken. The Indian Journal of Animal Sciences, Delhi, India, v. 67, n. 7, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/34842. Acesso em: 24 oct. 2025.