1. Conostigmus antiquus sp. n., a fossil ceraphronoid species from Baltic amber (Hymenoptera, Ceraphronoidea);Alekseev;Amber and Fossils,1995
2. Late Cretaceous Megaspilidae (Hymenoptera) from amber of the Taymyr;Alekseev;Paleontologichheskii Zhurnal [Paleontological Journal],1981
3. A new Cretaceous conifer from northern Alaska;Arnold;American Journal of Botany,1955
4. A monograph of the North American proctotrypidae;Ashmead;Bulletin of the United States National Museum,1893
5. Lebanese amber;Azar,2010