Allen, Gary C., and Paul C. Ragland. "Chemical and Mineralogical Variations During Prograde Metamorphism, Great Smoky Mountains, North Carolina and Tennessee." Geological Society of America Bulletin 83, no. 5 (1972): 1285-1297.

Allen, Gary C.. Chemical and Mineralogic Variations During Prograde Metamorphism in the Great Smoky Mountains of North Carolina-Tennessee. Chapel Hill, NC: University of North Carolina, 1968.