Platnauer, H.M. (1888)
Note on Hybodus obtusus, Ag. Annual report of the Yorkshire Philosophical Society, 1887, 35–36

Platnauer, H.M. (1887)
On the occurrence of Strophodus rigauxi (Sauv.) in the Yorkshire Cornbrash. Annual report of the Yorkshire Philosophical Society, 1886, 36–40