Alekseev, A.S. & Lebedev, O.A. & Barskov, I.S. & Barskova, M.I. & Kononova, L.I. & Chizhova, V.A. (1994)
On the stratigraphic position of the Famennian and Tournaisian fossil vertebrate beds in Andreyevka, Tula Region, Central Russia.
Proceedings of the Geologists' Association, 105(1), 41–52 DOI: 10.1016/S0016-7878(08)80137-X