- Libbey, L. M., M. E. Morgan, T. B. Putnam, and J. A. Rudinsky. 1974. Pheromones released during inter- and intra-sex response of the scolytid beetle, Dendroctonus brevicomis . Journal of Insect Physiology 20:1667-1671.
- Libbey, L. M., M. E. Morgan, T. B. Putnam, and J. A. Rudinsky. 1976. Isomer of antiaggregative pheromone identified from male Douglas-fir beetle: 3-methylcyclohex-3-en-1-one . Journal of Insect Physiology 22:871-873.
- Libbey, L. M., A. C. Oehlschlager, and L. C. Ryker. 1983. 1-Methylcyclohex-2-en-1-ol as an aggregation pheromone of Dendroctonus pseudotsugae . Journal of Chemical Ecology 9:1533-1542.
- Rudinsky, J. A., M. Morgan, L. M. Libbey, and R. R. Michael. 1973. Sound production in Scolytidae: 3-methyl-2-cyclohexen-1-one released by the female Douglas-fir beetle in response to male sonic signal . Environmental Entomology 2:505-509.
- Rudinsky, J. A., M. E. Morgan, L. M. Libbey, and T. B. Putmam. 1974a. Additional components of the Douglas-fir beetle (Col, Scolytidae) aggregative pheromone and their possible utility in pest control . Zeitschrift fur Angewandte Entomologie 76:65-77.
- Rudinsky, J. A., M. E. Morgan, L. M. Libbey, and T. B. Putmam. 1974b. Antiaggregative-rivalry pheromone of the mountain pine beetle, and a new arrestant of the southern pine beetle . Environmental Entomology 3:90-98.
- Rudinsky, J. A., M. E. Morgan, L. M. Libbey, and T. B. Putmam. 1976. Release of frontalin by male Douglas-fir beetle . Zeitschrift fur Angewandte Entomologie 81:267-269.
- Rudinsky, J. A., M. E. Morgan, L. M. Libbey, and T. B. Putmam. 1977. Limonene released by the scolytid beetle Dendroctonus pseudotsugae . Zeitschrift fur Angewandte Entomologie 82:376-380.
- Rudinsky, J. A., L. C. Ryker, R. R. Michael, L. M. Libbey, and M. E. Morgan. 1976. Sound production in Scolytidae: female sonic stimulus of male pheromone release in two Dendroctonus beetles . Journal of Insect Physiology 22:1675-1681.
- Ryker, L. C., and L. M. Libbey. 1982. Frontalin in the male mountain pine beetle . Journal of Chemical Ecology 8:1399-1410.
- Ryker, L. C., L. M. Libbey, and J. A. Rudinsky. 1979. Comparison of volatile compounds and stridulation emitted by the Douglasfir beetle from Idaho and western Oregon populations . Environmental Entomology 8:789-798.
- Libbey, L. M., L. C. Ryker, and K. L. Yandell. 1985. Laboratory and field studies of volatiles released by Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) . Journal of Applied Entomology 100:381-392.