1. When and where did India and Asia collide?;Aitchison;Journal of Geophysical Research,2007
2. Taxonomy and biostratigraphic significance of a new diatom, Thalassionema schraderi;Akiba;Bacillaria,1982
3. Middle Miocene to Quaternary diatom biostratigraphy in the Nankai Trough and Japan Trench, and modified Lower Miocene through Quaternary diatom zones for middle-to-high latitudes of the North Pacific;Akiba,1986
4. The Neogene micro- and chronostratigraphies in Hokkaido — special reference to those of the Southwestern part of the Kushiro Coal Field Area, Eastern Hokkaido, Japan;Akiba;Journal of the Japanese Association of Petroleum Technologists,1983
5. Taxonomy, morphology and phylogeny of the Neogene diatom zonal marker species in the middle-high latitudes of the North Pacific;Akiba,1986