Taxonomic revision and evolution of Cambrian mollusks of the genus Aldanella Vostokova, 1962 (Gastropoda: Archaeobranchia) P. Yu. ParkhaevG. A. Karlova OriginalPaper 24 December 2011 Pages: 1145 - 1205
Permian ammonoids: Biostratigraphic, biogeographical, and ecological analysis T. B. Leonova OriginalPaper 24 December 2011 Pages: 1206 - 1312