2 literature references for Porcellio longipennis Budde-Lund, 1885:

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: Budde-Lund, G.
Year: 1885
Title: Crustacea Isopoda terrestria, per familias et genera et species descripta. 319