Polygraphus proximus(POLGPR)
Distribution details in Japan (Honshu)
* Niisima Y (1910) Die borkenkaefer Nord-und Mittel- Japans. Transactions of the Sapporo Natural History Society 3, 1-18 (in German) .
* Nobuchi A (1979) Bark beetles of tribe Polygraphini in Japan (Coleoptera, Scolytidae). Bulletin of the Forestry and Forest Products Research Institute 308, 1-14.
* Tokuda M, Shoubu M, Yamaguchi D, Yukawa J (2008) Defoliation and dieback of Abies firma (Pinaceae) trees caused by Parendaeus abietinus (Coleoptera: Curculionidae) and Polygraphus proximus (Coleoptera: Scolytidae) on Mount Unzen, Japan. Applied Entomology and Zoology 43(1), 1-10.
* Nobuchi A (1979) Bark beetles of tribe Polygraphini in Japan (Coleoptera, Scolytidae). Bulletin of the Forestry and Forest Products Research Institute 308, 1-14.
* Tokuda M, Shoubu M, Yamaguchi D, Yukawa J (2008) Defoliation and dieback of Abies firma (Pinaceae) trees caused by Parendaeus abietinus (Coleoptera: Curculionidae) and Polygraphus proximus (Coleoptera: Scolytidae) on Mount Unzen, Japan. Applied Entomology and Zoology 43(1), 1-10.