1. A preliminary note of some new mammals from the Upper Eocene of Egypt;Andrews;Egypt Surv. Dept.,1902
2. On the mine water in the Jôban Iwaki Coal Mine;Arakawa;J. Min. Metall. Inst. Jpn.,1961
3. Japanese Paleogene from the view-point of foraminifera with descriptions of several new species;Asano;Japanese Rep. Dept. Geol. Paleontol., Faculty Sci., Tohoku Univ.,1962
4. Essai monographique sur un nouveau genre de mammifère fossile trouvé dans la Haute-Loire, et nommé Entelodon;Aymard;Ann. Soc. d’Agric., Sci., Arts Commerce du Puy,1846
5. Na Duong (northern Vietnam) – an exceptional window into Eocene ecosystems from Southeast Asia;Böhme;Zitteliana A,2013