1. Armstrong, J.G. & J.D. Williams. 1971. Cave and spring fishes of the southern bend of the Tennessee River. J. Tenn. Acad. Sci. 46: 107–115.
2. Bailey, V. 1933. Cave life of Kentucky, mainly in the Mammoth Cave region. Amer. Mid. Nat. 14: 385–634.
3. Banister, K.E. 1984. A subterranean population of Garra barreimiae (Teleostei: Cyprinidae) from Oman, with comments on the concept of regressive evolution. J. Nat. Hist. 18: 927–938.
4. Beck, B.F., M. Fram & J.R.6Carvajal. 1976. The Aguas Buenas Caves, Puerto Rico: geology, hydrology, and ecology with special reference to the histoplasmosis fungus. Nat. Speleol. Soc. Bull. 33: 1–16.
5. Brandon, R.A. 1971. North American troglobitic salamanders: some aspects of modification in cave habitats, with special reference to Gyrinophilus palleucus. Nat. Speleol. Soc. Bull. 33: 1–21.