7 literature references for Platypygius crassus (Karny, 1907):

Author: Harz
Year: 1975
Title: Die Orthopteren Europas II
Source: Series Entomologica (Ser. Entomol.) 11:1-939, 3519 figs.
Author: Bei-Bienko & Mishchenko
Year: 1951
Title: Keys to the fauna of the U.S.S.R. [1964 English translation, no. 40]
Source: Locusts and Grasshoppers of the U.S.S.R. and Adjacent Countries, Zoological Inst. of the U.S.S.R. Academy of Sciences, Moscow/Leningrad 2:385-667 [1-291]
Author: Uvarov
Year: 1942[1941]
Title: New and less known southern Palaearctic Orthoptera
Source: Transactions of the American Entomological Society (Trans. Amer. Entomol. Soc.) 67:303-361, Pl. 25-29
Author: Willemse, F.M.H. & L.P.M. Willemse
Year: 2008
Title: An annotated checklist of the Orthoptera-Saltatoria from Greece including an updated bibliography
Source: Articulata Beiheft 13
Author: Uvarov
Year: 1926
Title: New or less known Acrididae from Central Asia
Source: Eos, Revista española de Entomología (Eos) 2:321-359
Author: Uvarov
Year: 1927
Title: Acrididae of Central Asia. (in Russian)
Source: Expt. Plant Protect. Sta. Uzbekistan 1927:214 pp.
Author: Karny
Year: 1907
Title: Beitrage zur einheimischen Orthopterenfauna
Source: Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien (Verh. der Zoologisch-Botanischen Gesellsch. Wien) 57:275-287