2 literature references for Cercopis similis (Lethierry, 1888):

Author: Lallemand V.
Year: 1912
Title: Homoptera Fam. Cercopidae.
Source: Genera Insectorum. Diriges par P. Wytsman. Bruxelles, 143: 1-167.
Author: Lethierry L. F.
Year: 1888
Title: Description de quatre Homoptères nouveaux d'Irkoutsk
Source: Entomological Review, 7: 252-254.