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2. Andersen NM (1975) The Limnogonus and Neogerris of the Old World with character analysis and a reclassification of the Gerrinae (Hemiptera: Gerridae). Ent Scand Supp 7:1–96
3. Andersen NM (1976) A comparative study of locomotion on the water surface in semiaquatic bugs (Insecta, Hemiptera, Gerromorpha). Vidensk Meddr Dansk Naturh Foren 139:337–396
4. Andersen NM (1977) A new and primitive genus and species of Hydrometridae (Hemiptera, Gerromorpha) with a cladistic analysis of relationships within the family. Ent Scand 8:301–316
5. Andersen NM (1978) A new family of semiaquatic bugs for Paraphrynovelia Poisson with a cladistic analysis of relationships (Insecta, Hemiptera, Gerromorpha). Steenstrupia 4:211–225