2 literature references for Trichoniscus pusillus Verhoeff, 1917D:

Author: Schotte, M., B.F. Kensley, and S. Shilling.
Year: 1995
Title: nwards). World list of Marine, Freshwater and Terrestrial Crustacea Isopoda. National Museum of Natural History Smithsonian Institution: Washington D.C., USA.
Author: Verhoeff, K. W.
Year: 1917
Title: Zur Kenntnis de Gattungen Trichoniscus und Mesoniscus. (Ueber Isopoden, 19. Aufsatz.). Zoologischer Anzeiger 49(2):40-57.