Böcher, Jens. 1972. “Feeding Biology of Nysius Groenlandicus (Zett.) (Heteroptera: Lygaeidae) in Greenland, With a Note on Oviposition in Relation to Food-Source and Dispersal of the Species”. Meddelelser Om Grønland 191 (4):53 pp. https://doi.org/10.7146/mog.v191.150082.