BERG, L.; ABRAHAMSSON, Åke. Clas Hermansson in memoriam. Ornis Svecica, Lund, Sweden, v. 31, p. 75–77, 2021. DOI: 10.34080/os.v31.23214. Disponível em: https://journals.lub.lu.se/os/article/view/23214. Acesso em: 28 sep. 2022.