1. Oligocene foraminifera from Utsunai, Tonbetsu-mura, North Hokkaido;Asano;Short Pap., Inst. Geol. Paleontol., Tohoku Univ., Sendai,1953
2. Some Paleogene smaller foraminifera from Japan;Asano;Tohoku Univ., Sci., Rep., 2nd ser.,1958
3. Paleogene geochronology: an integrated approach;Aubry;Paleoceanography,1988
4. Upper Cretaceous foraminifera from the Carlsbad area, San Diego County, California;Bandy;J. Paleontol.,1951
5. Distribution of benthic foraminifera at the Cretaceous-Tertiary boundary of Trinidad (West Indies);Beckmann,1960