Template:Jacobson et al., 1978
- Jacobson, R.S.; Matthews, R.W.; Macdonald, J.F. 1978: A systematic study of the Vespula vulgaris group with a description of a new yellowjacket species in eastern North America (Hymenoptera: Vespidae). Annals of the Entomological Society of America 71(3): 299–312. ingentaconnect