(es) Esther Z. Herrera, 2002, Las estructuras fonéticas de la lengua emberá, dins Crevels, Mily et Simon van de Kerke, Sérgio Meira, Hein van der Voort (editors), Current Studies on South American Languages, Indigenous Languages of Latin America 3, p. 111-126, Lèida, CNWS ISBN: 90-5789-076-3