Nicholas, Niki Stephanie, Shephard M. Zedaker, and Christopher C. Eagar. "A Comparison of Overstory Community Structure in Three Southern Appalachian Spruce-Fir Forests." Bulletin of the Torrey Botanical Club 119, no. 3 (1992): 316-332.

Zedaker, Shephard M., Niki Stephanie Nicholas, and Christopher C. Eagar. "Assessment of Forest Decline in the Southern Appalachian Spruce-Fir Forest, USA." In Air Pollution and Forest Decline: Proceedings of the 14th International Meeting for Specialists in Air Pollution Effects on Forest Ecosystems, International Union of Forest Research O, 239-44. Birmensdorf, Switzerland: Eidgenössische Anstalt für das forstliche Versuchswesen, 1989.

Groton, Elizabeth, and Christopher C. Eagar. Southern Appalachian Red Spruce--Fraser Fir Forests In Analyses of Great Smoky Mountain Red Spruce Tree Ring Data. New Orleans, LA: U.S. Department of Agriculture, Forest Service,, 1988.

Busing, Richard T., Edward E. C. Clebsch, Christopher C. Eagar, and Eric F. Pauley. "Two Decades of Change in a Great Smoky Mountains Spruce-Fir Forest." Bulletin of the Torrey Botanical Club 115, no. 1 (1988): 25-31.

Eagar, Christopher C.. Investigations of Balsam Woolly Aphid-Fraser Fir Interaction:  Feeding Site Characteristics and Wound Response. Knoxville, TN: The University of Tennessee, 1985.

Eagar, Christopher C., and Peter S. White. "Review of the Biology and Ecology of the Balsam Woolly Aphid in Southern Appalachian Spruce-Fir Forests." In The Southern Appalachian Spruce-Fir Ecosystem: Its Biology and Threats, 36-50. Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory , 1984.

Hay, Ronald L., Christopher C. Eagar, and Kristine D. Johnson. Status of the Balsam Woolly Aphid in the Great Smoky Mountains National Park --- 1976 In Management Report. Gatlinburg, TN: Uplands Field Research Laboratory, 1976.