BioStor
 | A list of Coleoptera from the southern shore of Lake Superior, with remarks on geographical distribution Wickham Henry Frederick (1897) Proceedings of the Davenport Academy of Natural Sciences 6: 125-169 |
 | A catalogue of the Coleoptera of Colorado H Wickham (1902) Bulletin from the Laboratories of Natural History of the State University of Iowa 5: 217-310 |