HAFFER, Jürgen. Interspecific competition as a possible factor in limiting the range of some trans-andean forest birds. El Hornero, Argentina, ARG, v. 10, n. 4, p. 438–440, 1967. DOI: 10.56178/eh.v10i4.1303. Disponível em: https://elhornero.avesargentinas.org.ar/home/article/view/1303.. Acesso em: 30 nov. 2025.