VAN PAASSEN, Aad G; VELDMAN, Dick H; BEINTEMA, Albert J. A simple device for determination of incubation stages in eggs. Wildfowl, [S. l.], v. 35, p. 173–178, 1984. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155052. Acesso em: 17 dec. 2025.