Tennant, J. (1847)
A stratigraphical list of British fossils; arranged under the principal division of the British strata, with a few elementary remarks on their character and localities.
London, Reeve Brothers, Strand, 132pp
Geinitz, H.B. (1875)
Das Elbtalgebirge in Sachsen. Teil II
Palaeontographica, 20(2), 206–229