- Haack, R. A., and G. Paiz-Schwartz. 1997. Bark beetle (Coleoptera: Scolytidae) outbreak in pine forests of the Sierra de las Minas Biosphere Reserve, Guatemala. Entomological News 10867-76.
- Haack, R., and G. Paiz-Schwartz. 1997. Bark beetle (Coleoptera: Scolytidae) outbreak in pine forests of the Sierra de las Minas Biosphere Reserve, Guatemala . Entomological News 108:67-76.