Reference:
Perrard, Adrien & Haxaire, Jean & Rortais, Agnès & Villemant, Claire. (2009). Observations on the colony activity of the Asian hornet Vespa velutina Lepeletier 1836 (Hymenoptera: Vespidae: Vespinae) in France. Annales- Societe Entomologique de France. 45. 119-127. 10.1080/00379271.2009.10697595.URL:
https://www.researchgate.net/publication/215905689_Observations_on_the_colony_activity_of_the_Asian_hornet_Vespa_velutina_Lepeletier_1836_Hymenoptera_Vespidae_Vespinae_in_FranceLiterature