Lozano Martin, C., M. C. Aranda, N. Kidd, and M. Jervis. 1994. The role of parasitism and intraspecific competition in the population dynamics of the bark beetle, Leperisinus varius (Fabr) (Col, Scolytidae) on European olives (Olea europea L) . Journal of Applied Entomology 117:182-189.