Rutanen, I. and Rassi, P. (1991) “<i>Coelambus polonicus</i> (Aube) and <i>C. parallelogrammus</i> (Ahrens) new to the Finnish fauna (Coleoptera, Dytiscidae)”, Entomologica Fennica, 2(1), p. 23. doi: 10.33338/ef.83503.