Savitskiy, Yu.V. & Ivanov, A.O. & Orlov, A.N. (2000)
Atlas of Microremains from the Early Carboniferous of North-Eastern Slope of Moscow Syneclise (Ostracods, Conodonts, Vertebrates). Part 1. Msta and Putlino Formations. St Petersburg Univerity Publishing House. 88 pp.(in Russian).