J. F.  Lawrence, Beutel, R. G., Leschen, R. A. B., and lipi?ski, S. A. ?., ?Glossary of morphological terms.?, in Coleoptera, Vol. 2: Morphology and Systematics (Elateroidea, Cucujifomia excl. Phytophaga). , vol. Part 39, Berlin, New York: Walter De Gruyter, 2010.