Itamies, J., E. Pulliainen, and J. Siekkinen. “Fluctuations in Catches of Epirrita Autumnata (Lepidoptera, Geometridae) in Eastern Finnish Forest Lapland”. Oecologia Montana, Vol. 2, no. 1-2, Dec. 1993, pp. 19-22, https://om.vuvb.uniza.sk/index.php/OM/article/view/27.