- Berryman, A. A., N. C. Stenseth, and D. J. Wollkind. 1984. Metastability of forest ecosystems infested by bark beetles . Researches in Population Ecology 26:13-29.
- Wollkind, D. J., A. A. Berryman, and N. C. Stenseth. 1984. A stability analysis relevant to forest ecosystems infested by bark beetles and the paradox of enrichment. In: R. H. Lamberson (ed.), Mathematical models of renewable resources. Vol. 3. Proceedings, Third Pacific Coast Conference on Mathematical Model of Renewable Resources. Davis, California.
- Wollkind, D. J., J. A. Logan, and A. A. Berryman. 1978. Asymptotic methods for modeling biological processes . Researches in Population Ecology 20:79-90.