2 literature references for Ilybius chalconatus (Panzer, 1796):

Author: Nilsson, Anders N.
Year: 2001
Title:
Source: World Catalogue of Insects, volume 3: Dytiscidae (Coleoptera)
Author: Nilsson, A. N.
Year: 2004
Title: World Catalogue of Dytiscidae - corrections and additions, 2 (Coleoptera: Dytiscidae)
Source: Koleopterologische Rundschau, vol. 74