Olivier, A. G. 1792. Encyclopédie méthodique. Histoire naturelle. Insectes. Tome 6. (pt. 2). Paris: Panckoucke, pp. 369-704.

Notes: Publication date from Sherborn & Woodward (1906b:577). Ants pp. 469-506.

Olsen, O. W. 1934. Notes on the North American harvesting ants of the genus Pogonomyrmex Mayr. Bulletin of the Museum of Comparative Zoology 77:493-514. PDF
Onoyama, K. 1989c. Three ants (Hymenoptera: Formicidae) new to Hokkaido, Japan. Japanese Journal of Entomology 57:604.
Onoyama, K. 1997. Taxonomic notes on the ant Myrmecina nipponica Wheeler stat. nov. (Hymenoptera: Formicidae). Research Bulletin of Obihiro University. Natural Science 20:151-153.
Onoyama, K.; Terayama, M. 1994. A list of references on Japanese ants. [In Japanese.]. Tokyo: Myrmecological Society of Japan, iii + 50 pp.