Horton H. Hobbs III; Rickard A Olson; Elizabeth G Winkler; CULVER, David C.. Mammoth Cave (A Human and Natural History). Cham : Springer, 2017. 275 s. Dostupné online.ISBN 978-3-319-53718-4. S. 1-3.
igme.es
Palmer, A. N., 2016. The Mammoth Cave system, Kentucky, USA. Boletín Geológico y Minero, 127 (1): 131-145ISSN: 0366-0176 [1]
loc.gov
Map The Flint Mammoth cave system, Mammoth Cave National Park, Kentucky, U.S.A. [online]. loc.gov, [cit. 2021-01-12]. Dostupné online.