@article{oai:niigata-u.repo.nii.ac.jp:00006867,
 author = {Tazawa, Jun-ichi and Miyake, Yukio},
 journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)},
 month = {Mar},
 note = {A sole specimen of Gigantoproductus cf. okensis (Sarytcheva, 1928) is described from the Lower Carboniferous (Upper Visean) Onimaru Formation of the Okusakamotozawa area, southern Kitakami Mountains, northeast Japan. This specimen is the first described Gigantoproductus from the Lower Carboniferous succession of the South Kitakami region.},
 pages = {1--6},
 title = {Gigantoproductus (Brachiopoda) from the Lower Carboniferous (Upper Visean) Onimaru Formation of the southern Kitakami Mountains, NE Japan},
 volume = {17},
 year = {2002}
}