BENSCH, Staffan; NILSSON, Lars G R; NOTHAGEN, Per; OLSSON, Peter; ÅKESSON, Mikael. A Chiffchaff Phylloscopus c. collybita with mixed Chiffchaff and Willow Warbler Ph. trochilus song—genetic evidence. Ornis Svecica, Lund, Sweden, v. 11, n. 1–2, p. 108–111, 2001. DOI: 10.34080/os.v11.22869. Disponível em: https://journals.lub.lu.se/os/article/view/22869. Acesso em: 24 apr. 2024.