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Keller, L.; Reeve, H. K. 1994. Genetic variability, queen number, and polyandry in social Hymenoptera. Evolution 48:694-704. PDF

Keller, R. A. 2000. Cladistics of the tribe Ectatommini (Hymenoptera: Formicidae): a reappraisal. Insect Systematics and Evolution 31:59-69. PDF

Keller, R. A. 2011. A phylogenetic analysis of ant morphology (Hymenoptera: Formicidae) with special reference to the poneromorph subfamilies. Bulletin of the American Museum of Natural History 355:1-90. PDF

Keller, R. A.; Peeters, C.; Beldade, P. 2014. Evolution of thorax architecture in ant castes highlights trade-off between flight and ground behaviors. eLife 2014 (3):19pp. e01539. 10.7554/eLife.01539.001 PDF

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Kempf, W. W. 1951. A taxonomic study on the ant tribe Cephalotini (Hymenoptera: Formicidae). Revista de Entomologia (Rio de Janeiro) 22:1-244. PDF

Kempf, W. W. 1952. A synopsis of the pinelii-complex in the genus Paracryptocerus (Hym. Formicidae). Studia Entomologica 1:1-30. PDF

Kempf, W. W. 1953. Uma nova espécie de Paracryptocerus da Colômbia, praga do cafeeiro (Hymenoptera, Formicidae). Papeis Avulsos de Zoologia (São Paulo) 11:79-88. PDF

Kempf, W. W. 1954. A descoberta do primeiro macho do gênero Thaumatomyrmex Mayr (Hymenoptera, Formicidae). Revista Brasileira de Entomologia 1:47-52. PDF

Kempf, W. W. 1956. A morphological study on the male genitalia of Paracryptocerus (P.) pusillus (Hymenoptera: Formicidae). Revista Brasileira de Entomologia 5:101-110. PDF

Kempf, W. W. 1957. Sôbre algumas espécies de Procryptocerus com a descrição duma espécie nova (Hymenoptera, Formicidae). Revista Brasileira de Biologia 17:395-404. PDF

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Kempf, W. W. 1958b. Three new ants of the genus Strumigenys from Colombia (Hym. Formicidae). Revista Brasileira de Entomologia 8:59-68. PDF

Kempf, W. W. 1958c. Sôbre algumas formigas neotrópicas do gênero Leptothorax Mayr (Hymenoptera: Formicidae). Anais da Academia Brasileira de Ciencias 30:91-102. PDF

Kempf, W. W. 1958d. Synonymic note on ants of the genus Paracryptocerus Emery (Hymenoptera: Formicidae). Entomological News 69:108-110. PDF

Kempf, W. W. 1958e. Discovery of the ant genus Wadeura in Brazil (Hymenoptera: Formicidae). Revista Brasileira de Entomologia 8:175-180. PDF

Kempf, W. W. 1958f. Estudos sôbre Pseudomyrmex. II. (Hymenoptera: Formicidae). Studia Entomologica (n.s.)1:433-462.

Kempf, W. W. 1958g. The ants of the tribe Dacetini in the State of Sao Paulo, Brazil, with the description of a new species of Strumigenys. (Hymenoptera: Formicidae). Studia Entomologica (n.s.)1:553-560. PDF

Kempf, W. W. 1959a. Sôbre algumas formigas Cephalotini do Museu de Oxford (Hymenoptera, Formicidae). Revista Brasileira de Biologia 19:91-98. PDF

Kempf, W. W. 1959b. Insecta Amapaensia. - Hymenoptera: Formicidae. Studia Entomologica (n.s.)2:209-218. PDF

Kempf, W. W. 1959c. A revision of the Neotropical ant genus Monacis Roger (Hymenoptera: Formicidae). Studia Entomologica (n.s.)2:225-270. PDF

Kempf, W. W. 1959d. A synopsis of the New World species belonging to the Nesomyrmex-group of the ant genus Leptothorax Mayr (Hymenoptera: Formicidae). Studia Entomologica (n.s.)2:391-432. PDF

Kempf, W. W. 1959e. Transmission of the Borgmeier Collection of ants. Studia Entomologica (n.s.)2:474. PDF

Kempf, W. W. 1959f. Two new species of Gymnomyrmex Borgmeier, 1954 from southern Brazil, with remarks on the genus (Hymenoptera, Formicidae). Revista Brasileira de Biologia 19:337-344. PDF