Billen, J. P. J. 1982a. The Dufour gland closing apparatus in Formica sanguinea Latreille (Hymenoptera, Formicidae). Zoomorphology (Berlin) 99:235-244.

Hölldobler, B.; Wilson, E. O. 1986a. Soil-binding pilosity and camouflage in ants of the tribes Basicerotini and Stegomyrmecini (Hymenoptera, Formicidae). Zoomorphology (Berlin) 106:12-20.

Schönitzer, K.; Lawitzky, G. 1987. A phylogenetic study of the antenna cleaner in Formicidae, Mutillidae, and Tiphiidae (Insecta, Hymenoptera). Zoomorphology (Berlin) 107:273-285.

Hölldobler, B.; Palmer, J. M.; Masuko, K.; Brown, W. L., Jr. 1989. New exocrine glands in the legionary ants of the genus Leptanilla (Hymenoptera: Formicidae: Leptanillinae). Zoomorphology (Berlin) 108:255-262.

Schoeters, E.; Billen, J. P. J. 1994a. The intramandibular gland, a novel exocrine structure in ants (Insecta, Hymenoptera). Zoomorphology (Berlin) 114:125-131.

Wheeler, D. E.; Krutzsch, P. H. 1994. Ultrastructure of the spermatheca and its associated gland in the ant Crematogaster opuntiae (Hymenoptera, Formicidae). Zoomorphology (Berlin) 114:203-212.

Hölldobler, B.; Obermayer, M.; Peeters, C. 1996. Comparative study of the metatibial gland in ants (Hymenoptera, Formicidae). Zoomorphology (Berlin) 116:157-167.

Testsson, T. 2000. Test reference. Please ignore. Zoomorphology (Berlin) 99:1. PDF

Billen, J. P. J.; Grasso, D. A.; Mori, A.; Le Moli, F. 2001. Structural and functional changes of the Dufour gland in gynes of the amazon ant Polyergus rufescens (Hymenoptera, Formicidae). Zoomorphology (Berlin) 121:55-61.

Grasso, D. A.; Mori, A.; Le Moli, F.; Billen, J. P. J. 2005. Morpho-functional comparison of the Dufour gland in the female castes of the Amazon ant Polyergus rufescens (Hymenoptera, Formicidae). Zoomorphology (Berlin) 124:149-153. PDF