Check date values in: |accessdate= (help) "Report of the Scientific Committee, Tromsø, Norway, 30 May to 11 June 2011 Annex F: Sub-Committee on Bowhead, Right and Gray Whale" (PDF).
Systema regni animalis: 610.  ^ a ă “Report of the Scientific Committee, Tromsø, Norway, 30 May to ngày 11 tháng 6 năm 2011 Annex F: Sub-Committee on Bowhead, Right and Gray Whale” (PDF).