Reference
Markus Lambertz, Kerstin Graba (2011): Remarks on the northeasternmost distribution of Elgaria coerulea principis Baird & Girard, 1852 (Squamata: Anguidae) in British Columbia – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 60: 229 - 231.