B. Byttebier and P. L. M. Torres, “Description of the preimaginal stages of Enochrus (Hugoscottia) variegatus (Steinheil, 1869) and E. (Methydrus) vulgaris (Steinheil, 1869) (Coleoptera: Hydrophilidae), with emphasis on larval morphometry and chaetotaxy”, Zootaxa, vol. 2139, no. 1, pp. 1–22, Jun. 2009.