Johansen, Jeffrey R., Catherine E. Olsen, Robert L. Wilson, Karolina Fuíková, and Dale A. Casamatta. "Leptolyngbya Species from Selected Seep Walls in the Great Smoky Mountains National Park." Algological Studies 126, no. 1 (2008): 21-36.

Casamatta, Dale A., Shannon R. Gomez, and Jeffrey R. Johansen. "Rexia erecta gen. et sp. nov. and Capsosira lowei sp. nov., two newly described cyanobacterial taxa from the Great Smoky Mountains National Park (USA)." Hydrobiology 185 (2006): 13-26.