Väisänen, R. and Rassi, P. 1990. Abundance and distribution of <i>Geotrupes sfercorarius</i> in Finland (Coleoptera, Scarabaeidae). Entomologica Fennica. 1, 2 (Jun. 1990), 107–111. DOI:https://doi.org/10.33338/ef.83363.