Reference
Runar Krogen (2001): On the occurrence of Vanessa atalanta (Linnaeus, 1758) and Vanessa cardui (Linnaeus, 1758) in Central Norway 1999 and 2000, and earlier stage records of both species north of the Arctic Circle in North Norway 2000 (Lepidoptera, Nymphalidae) – Atalanta – 32: 75 - 79.