Skiles, Wesley C (1987). "The scientific future of cave diving". In: Mitchell, CT (Eds.) Diving for Science 86. Proceedings of the American Academy of Underwater Sciences Sixth Annual Scientific Diving Symposium. Held October 31 – November 3, 1986 in Tallahassee, Florida, USA. American Academy of Underwater Sciences. Archived from the original on April 15, 2013. Retrieved 2011-01-16.