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♦ ¹PARROT CLAYLICKS: DISTRIBUTION, PATTERNS OF USE AND ECOLOGICAL CORRELATES FROM A PARROT ASSEMBLAGE IN SOUTHEASTERN PERU, ALAN TRISTRAM KENNETH LEE, dissertation for DOCTOR OF PHILOSOPHY, Manchester Metropolitan University, November 2010
♦ ²THE DIET OF THE OILBIRD IN VENEZUELA, Carlos Bosque, Rudyard Ramírez & Domingo Rodríguez, ORNITOLOGIA NEOTROPICAL 6: 67-80, 1995
♦ ³Foods and Feeding Behavior of Wild Black-capped Capuchin (Cebus apella), KOSEI IZAWA, PRIMATES, 20(1): 57-76, January 1979