VOGRIN, Milan. Breeding birds in hop fields. Ornis Svecica, Lund, Sweden, v. 12, n. 1–2, p. 92–94, 2002. DOI: 10.34080/os.v12.22843. Disponível em: https://journals.lub.lu.se/os/article/view/22843. Acesso em: 12 may. 2025.