Rydell, J.; Fagerström, J.; Andersson, S.; Stille, G.; Gelang, M.; Lancaster, W.; Svensson, M.; Tullberg, B. Convergence in Wing Coloration Between Orange Underwing Moths (<i>Archiearis</i> spp.) and Tortoiseshell Butterflies (<i>Aglais</i> Spp.). Entomol. Fennica 2001, 12, 65-71.