Late Devonian and Early Carboniferous ammonoids from the Tobigamori Formation in the Southern Kitakami Massif, Northeast Japan and their stratigraphic significance.
Journal of the Geological Society of Japan, 98 (3): 197-204, 4 figs.
Frech
1902
Über devonische Ammoneen.
Beiträge zur Paläontologie Österreich-Ungarns und des Orients, 14: 27-112, fig.1-38, pl.2-5; Wien and Leipzig.