Slovenia

• Ian Bishop (1997): Slovenia Cave Guide, Caves of the Classical Karst,
  Keyhole Caving Club, St. Albans, Herts, GB.
  Cave Guide to Slovenia - book available from The Keyhole Caving Club
• (): Kras - Slovene Classical Karst,
  Karst Research Institute ZRC SAZU
  
• Trevor R. Shaw (2000): Foreign Travellers In The Slovene Karst 1537-1900,
  Karst Research Institute ZRC SAZU, 2000, 224pp, 20*27 cm, paperback, ISBN 961-6182-12-X.
  
• Andrej Kranjc (1998): Kras (The Classical Karst) and the development of karst science,
  Karst Research Institute ZRC SAZU, Acta carsologica, 27/1, pp 151-164, ISSN 5836050.
• Andrej Kranjc (1997): The significance of E.A. Martel for Speleology in Slovenia,
  International Journal of Speleology, 26-3/4, pp 21-27, ISSN 3926672.
• Adolf Schmidl (1854): Die Grotten von Adelsberg, Lueg, Planina und Laas,