NILSSON, Sven G; OLSSON, Ola; SVENSSON, Sören; WIKTANDER, Ulf. Population trends and fluctuations in Swedish woodpeckers. Ornis Svecica, Lund, Sweden, v. 2, n. 1, p. 13–21, 1992. DOI: 10.34080/os.v2.22398. Disponível em: https://journals.lub.lu.se/os/article/view/22398. Acesso em: 17 jun. 2024.