D.  Mancini, Priore, R., Battaglia, D., and van Achterberg, C., ?Caenopachys hartigii (Ratzeburg)(Hymenoptera: Braconidae: Doryctinae) confirmed for Italy, with notes on the status of the genus Caenopachys Foerster?, Zoologische Mededelingen Leiden, vol. 77, no. 27, pp. 459-470, 2003.

Y.  Braet and van Achterberg, C., ?New species of Pambolus Haliday and Phaenocarpa Foerster (Hymenoptera: Braconidae: Pambolinae, Alysiinae) from French Guyana, Suriname and Panama?, Zoologische Mededelingen Leiden, vol. 77, no. 6, pp. 153-179, 2003.

Y.  Braet and van Achterberg, C., ?Doryctorgilus gen. nov. and other new taxa, with a study of the internal microsculpture of the ovipositor in the subfamily Orgilinae Ashmead (Hymenoptera: Braconidae)?, Zoologische Mededelingen Leiden, vol. 77, no. 6, pp. 127-152, 2003.

Y.  Braet, Barbalho, S. M., and van Achterberg, C., ?Description of four new genera and nine new species of Doryctinae (Hymenoptera: Braconidae) from French Guyana?, Zoologische Mededelingen Leiden, vol. 77, no. 5, pp. 93-125, 2003.

C.  van Achterberg, ?The European species of the subgenus Aliolus Say of the genus Eubazus Nees and of the genus Dicyrtaspis van Achterberg (Hymenoptera: Braconidae:?, Zoologische Mededelingen Leiden, vol. 77, no. 17, pp. 301-320, 2003.