Borden, J. H., L. J. Chong, K. N. Slessor, A. C. Oehlschlager, H. D. Pierce (Jr.), and B. S. Lindgren. 1981. Allelochemic activity of aggregation pheromones between three sympatric species of ambrosia beetles (Coleoptera: Scolytidae). Canadian Entomologist 113:557-563.