Reference:
Budrienė, A., 2003. Prey of Symmorphus Wasps (Hymenoptera: Eumeninae) in Lithuania. Acta Zoologica Lituanica. 13. 306-310. 10.1080/13921657.2003.10512686.
URL:
https://www.researchgate.net/publication/254326756_Prey_of_Symmorphus_Wasps_Hymenoptera_Eumeninae_in_Lithuania/link/0c960535525d1447d9000000/download
