HJORT, Christian. Gunnar Svärdson and the foundation of Ottenby Bird Observatory. Ornis Svecica, Lund, Sweden, v. 5, n. 2, p. 49–54, 1995. DOI: 10.34080/os.v5.23131. Disponível em: https://journals.lub.lu.se/os/article/view/23131. Acesso em: 25 apr. 2024.