Bendjoudi, Djamel; Voisin, Jean-Francois; Doumandji, Salaheddine; Baziz, Belkacem, 2005. Colonisation of the Algiers region by Ring-necked Parakeet Psittacula krameri (Ayes, Psittacidae) and first data of its feeding ecology in the region. Alauda. 73(3). 2005. 329-334.
Braun, Michael, 2009. Population development of the Ring-necked Parakeet Psittacula krameri in the Rhine-Neckar Region (Germany: Baden-Wurttemberg, Rhineland-Palatinate, Hesse), 1962-2008, in the context of its distribution in Europe . Vogelwelt. 130(2). 2009. 77-89.
Burton, Niall H. K.; Baker, Helen; Carter, Ian; Moore, Niall; Clements, Andy, 2010. The impacts of non-native species: a review of the British Ornithologists Union s Autumn 2008 Scientific Meeting. Ibis. 152(3). JUL 2010. 654-659.
Clergeau, Philippe; Vergnes, Alan; Delanoue, Remy., 2009. The Rose-ringed Parakeet, Psittacula krameri, introduced in Ile-de-France: distribution and diet. Alauda. 77(2). 2009. 121-132.
Fellous, Amina; Moulai, Riadh; Jacob, Jean-Paul, 2005. Introduction and breeding of rose-ringed Parakeet, Psittacula krameri, in Algeria. Aves. 42(3). 2005. 272-277.
Garrett, K. L. (1997). Population status and distribution of naturalized parrots in southern California. West. Birds 28, 181-195
Hossain, Tofazzal; Husain, Kazi Zaker; Rahman, Khalilur, 1993. Some aspects of the breeding biology of the rose-ringed parakeet, Psittacula krameri Borealis (Neumann). Bangladesh Journal of Zoology. 21(1). 1993. 77-85.
Kahl-Dunkel, Angelica; Werner, Richard, 2002. Winter distribution of Ring-necked Parakeet Psittacula krameri in Cologne. Vogelwelt. 123(1). 2002. 17-20.
Kasickova, D.; Sak, B.; Kvac, M.; Ditrich, O., 2009. Sources of potentially infectious human microsporidia: Molecular characterisation of microsporidia isolates from exotic birds in the Czech Republic, prevalence study and importance of birds in epidemiology of the human microsporidial infections. Veterinary Parasitology. 165(1-2). OCT 28 2009. 125-130.
Lambert, Mark S.; Massei, Giovanna; Bell, Jennifer; Berry, Leslie; Haigh, Carol; Cowan, David P., 2009. Reproductive success of rose-ringed parakeets Psittacula krameri in a captive UK population. Pest Management Science. 65(11). NOV 2009. 1215-1218.
Malhi, C. S.; Kaur, Rajdeep, 2002. Efficacy of chemical repellents in mixture against the rose-ringed parakeet, Psittacula krameri. International Pest Control. 44(1). January-February, 2002. 14-15.
Mase, Masaji; Imada, Tadao; Sanada, Yasuyuki; Etoh, Mariko; Sanada, Naoko; Tsukamoto, Kenji; Kawaoka, Yoshihiro; Yamaguchi, Shigeo, 2001. Imported parakeets harbor H9N2 influenza A viruses that are genetically closely related to those transmitted to humans in Hong Kong. Journal of Virology. 75(7). April, 2001. 3490-3494.
Matias, Rafael, 2008. Monthly counts of Ring-necked Parakeets Psittacula krameri at Jardim da Estrela, Lisbon. Airo. 18 2008. 24-28.
Morgan, David H. W., 1993. Feral rose-ringed parakeets in Britain. British Birds. 86(11). 1993. 561-564.
Petronilho, Joao M. S.; Vingada, Jose V.; Ferreira, Joao, 2004. Exotic birds in Quiaios-Mira coast (Beira litoral, Portugal) AIRO. 14 2004. 114-120.
Pithon, Josephine A.; Dytham, Calvin, 2001. Determination of the origin of British feral Rose-ringed Parakeets. British Birds. 94(2). February, 2001. 74-79.
Pithon, Josephine A.; Dytham, Calvin, 2002. Distribution and population development of introduced Ring-necked Parakeets Psittacula krameri in Britain between 1983 and 1998. Bird Study. 49(2). July, 2002. 110-117.
Strubbe, Diederik; Erik Matthysen and Catherine H. Graham, 2010. Assessing the potential impact of invasive ring-necked parakeets Psittacula krameri on native nuthatches Sitta europeae in Belgium. Journal of Applied Ecology 2010, 47, 549�557 doi: 10.1111
Summary: Available from: [Accessed 26 July 2010]
Strubbe, Diederik; Matthysen, Erik, 2007. Invasive ring-necked parakeets Psittacula krameri in Belgium: habitat selection and impact on native birds. Ecography. 30(4). AUG 2007. 578-588.
Strubbe, Diederik; Matthysen, Erik., 2009. Establishment success of invasive ring-necked and monk parakeets in Europe. Journal of Biogeography. 36(12). DEC 2009. 2264-2278.
Strubbe, Diederik; Matthysen, Erik, 2009. Experimental evidence for nest-site competition between invasive ring-necked parakeets (Psittacula krameri) and native nuthatches (Sitta europaea). Biological Conservation. 142(8). AUG 2009. 1588-1594.
Strubbe, Diederik; Matthysen, Erik, 2009. Predicting the potential distribution of invasive ring-necked parakeets Psittacula krameri in northern Belgium using an ecological niche modelling approach. Biological Invasions. 11(3). MAR 2009. 497-513.
Temara, Karim; Arnhem, Roger, 1996. Ring-necked Parakeets (Psittacula krameri) victims of climatic conditions in the Brussels Regions. Aves. 33(2). 1996. 128-129.
Weiserbs, Anne, 2010. Invasive species: The case of Belgian Psittacidae. Impacts, risks assessment and range of control measures. Aves. 47(1). MAR 2010. 21-35.