Willis, E.O. 1979. Behavior and ecology of two forms of white-chinned woodcreepers (Dendrocincla merula, Dendrocolaptidae) in amazonia. Papéis Avulsos de Zoologia. 33, 1-25 (1979-1980) (Jul. 1979), 27–66. DOI:https://doi.org/10.11606/0031-1049.1979.33.p27-66.