van Zeeland, Y.R.A.; Spruit, B.M.; Rodenburg, T.B.; et al. (2009). "Feather damaging behaviour in parrots: A review with consideration of comparative aspects". Applied Animal Behaviour Science. 121 (2): 75–95. doi:10.1016/j.applanim.2009.09.006.
Meehan, C.L.; Millam, J.R.; Mench, J.A. (2003). "Foraging opportunity and increased physical complexity both prevent and reduce psychogenic feather picking by young amazon parrots". Appl. Animal Behav. Sci. 80: 71–85. doi:10.1016/s0168-1591(02)00192-2.
van Hock, C.S.; King, C.E. (1997). "Causation and Influence of Environmental Enrichment on Feather Picking of the Crimson-Bellied Conure (Pyrrhura perlata perlata)". Zoo Biology. 16 (2): 161–172. doi:10.1002/(sici)1098-2361(1997)16:2<161::aid-zoo6>3.0.co;2-8.