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♦ ¹PLANT FOOD RESOURCES AND THE DIET OF A PARROT COMMUNITY IN A GALLERY FOREST OF THE SOUTHERN PANTANAL (BRAZIL), RAGUSA-NETTO, J. and FECCHIO, A., Braz. J. Biol., 66(4): 1021-1032, 2006
♦ ²PARROT 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