Forel, A. 1896f. Ants' nests. Annual Report of the Board of Regents of the Smithsonian Institution 1894:479-505. PDF

Notes: English translation of Forel (1892p).

Forel, A. 1904k. The psychical faculties of ants and some other insects. Annual Report of the Board of Regents of the Smithsonian Institution 1903:587-599.

Wasmann, E. 1913 ("1912"). The ants and their guests. Annual Report of the Board of Regents of the Smithsonian Institution 1912:455-474. PDF

Safford, W. E. 1922. Ant acacias and acacia ants of Mexico and Central America. Annual Report of the Board of Regents of the Smithsonian Institution 1921:381-394.

Schneirla, T. C. 1956. The army ants. Annual Report of the Board of Regents of the Smithsonian Institution 1955:379-406.