- Kikuchi, T., and K. Ogura. 1976. A three building site model for aggregation pheromone activities of the bark beetle Ips confusus. Insect Biochemistry 6:115-122.
- Nakashima, T., T. Iizuka, K. Ogura, M. Maeda, and T. Tanaka. 1982. Isolation of some microorganisms associated with five species of ambrosia beetles and two kinds of antibiotics produced by Xv-3 strain in these isolates . Hokkaido University, Journal of the Faculty of Agriculture 61:60-72.