Banks, R.C. (2011). "Taxonomy of Greater White-fronted Geese (Aves: Anatidae)". Proceedings of the Biological Society of Washington. 124 (3): 226–233. doi:10.2988/11-14.1. S2CID85077293.
Horacek, Micha (2011). "Backtracking the movements of a migratory bird: a case study of a white-fronted goose (Anser albifrons)". Rapid Communications in Mass Spectrometry. 25 (20): 3146–3150. Bibcode:2011RCMS...25.3146H. doi:10.1002/rcm.5209. PMID21953970.
Horacek, Micha (2011). "Backtracking the movements of a migratory bird: a case study of a white-fronted goose (Anser albifrons)". Rapid Communications in Mass Spectrometry. 25 (20): 3146–3150. Bibcode:2011RCMS...25.3146H. doi:10.1002/rcm.5209. PMID21953970.
Horacek, Micha (2011). "Backtracking the movements of a migratory bird: a case study of a white-fronted goose (Anser albifrons)". Rapid Communications in Mass Spectrometry. 25 (20): 3146–3150. Bibcode:2011RCMS...25.3146H. doi:10.1002/rcm.5209. PMID21953970.
peatlandsni.gov.uk
"Peatlands". Peatlandsni.gov.uk. 12 January 2011. Archived from the original on 30 October 2010. Retrieved 27 February 2013.
semanticscholar.org
api.semanticscholar.org
Banks, R.C. (2011). "Taxonomy of Greater White-fronted Geese (Aves: Anatidae)". Proceedings of the Biological Society of Washington. 124 (3): 226–233. doi:10.2988/11-14.1. S2CID85077293.