Audisio1, P., M. Trizzino, A. de Biase, E. Mancini, and G. Antonini. “A New Species of Hydraena (Coleoptera: Hydraenidae) of the H. Evanescens Complex from Sardinia”. Zootaxa, vol. 2318, no. 1, Dec. 2009, pp. 281–289, doi:10.11646/zootaxa.2318.1.9.