Next step toward a molecular phylogeny of click-beetles (Coleoptera: Elateridae): redefinition of Pityobiinae...
By Kundrata R., Gunter N.L., Douglas H., Bocak L. Austral Entomology 55: 291–302, 2015
Full title: Next step toward a molecular phylogeny of click-beetles (Coleoptera: Elateridae): redefinition of Pityobiinae, with a description of a new subfamily Parablacinae from the Australasian Region
Click beetle larvae of the USSR: Manual for identification
By Dolin V.G. Urozhai, Kiev. 126 pp. [In Russian], 1978
Well-illustrated keys to 257 spp. of ~60 genera, may be very helpful -- especially given the lack of a comprehensive treatment of the nearctic fauna. Taxonomy somewhat obsolete. Full text
An awkwardly titled 1981 English version exists
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