KÄLLANDER, H. Learning the task: age-related differences in the proficiency of Black-headed Gulls kleptoparasitising Lapwings. Ornis Svecica, Lund, Sweden, v. 10, n. 1, p. 7–12, 2000. DOI: 10.34080/os.v10.22883. Disponível em: https://journals.lub.lu.se/os/article/view/22883. Acesso em: 2 oct. 2022.