- Herard, F., and G. Mercadier. 1984. Biological complex of bark beetles on Pinus sylvestris L. in the Orleans forest (Loiret) France. Abstract. International Congress of Entomology, Proceedings, Hamburg 1984, 17:601.
- Herard, D., and G. Mercadier. 1996. Natural enemies of Tomicus piniperda and Ips acuminatus (Col; Scolytidae) on Pinus sylvestris near Orleans, France; Temporal occurrence and relative abundance, and notes on eight predatory species . Entomophaga 41:183-210.