- Baekstrom, P., U. Jacobsson, T. Norin, and C. R. Unelius. 1988. Synthesis and characterization of all four isomers of methyl 2,4—decadienoate for an investigation of the pheromone components of Pityogenes chalcographus . Tetrahedron 44:2541-2548.
- Byers, J. A., H. E. Hogberg, C. R. Unelius, G. Birgersson, and J. Lofqvist. 1989. Structure-activity studies on aggregation pheromone components of Pityogenes chalcographus (Coleoptera: Scolytidae): all stereoisomers of chalcogran and methyl-2 4-decadienoate . Journal of Chemical Ecology 15:685-696.
- Lanne, B. S., F. Schlyter, J. A. Byers, J. Lofqvist, A. Leufven, G. Bergstrom, J. N. C. V. d. Pers, R. Unelius, P. Baeckstrom, and T. 1987. Differences in attraction to semiochemicals present in sympatric pine shoot beetles, Tomicus minor and T piniperda . Journal of Chemical Ecology 13:1045-1067.