- Gregg, T. F., G. M. Filip, and J. S. Hadfield. 1980. Pacific Northwest Region (R-6). Pages 37-42 in P. W. Orr and H. D. Brown, Forest insect and disease conditions in the United States, 1978. United States Department of Agriculture, Forest Service. vi + 83 p.
- Filip, G. M., E. Christiansen, and C. A. Parks. 1989. Secondary resin production increases with vigor of Abies grandis inoculated with Trichosporium symbioticum in northeastern Oregon. United States Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, Oregon, Research Note PNW-489. 10 p.
- Filip, G. 1994. Forest health decline in central Oregon: A 13-year case study . Northwest science 68:233-340.
- Filip, G., and T. Schowalter. 1993. Synopsis. Pages 231-238 In T.D. Schowalter and G.M. Filip (eds.), Beetle-pathogen interactions in conifer forests. Academic Press: London.
- Hessburg, P., R. Mitchell, and G. Filip. 1994. Historical and current roles of insects and pathogens in eastern Oregon and Washington forested landscapes. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), General Technical Report PNW-GTR-327.
- Schowalter, T., and G. Filip. 1993a. Beetle-pathogen interactions in conifer forests. Academic Press: London.
- Schowalter, T., and G. Filip. 1993b. Bark beetle-pathogen-conifer interactions: an overview. Pages 3-19 In T.D. Schowalter and G.M. Filip (eds.), Beetlepathogen interactions in conifer forests. Academic Press: London.