Izbucul Cernei

Sursa:

• George Ponta, Robert Strusiewicz, Georgel Simion, Emilian Gaspar, 1984: Subterranean Stream Piracy in the Jiul de Vest - Cernisoara Karst Area- Romania; Theoretical and Applied Karstology, volume 1, Editat de Institutul de Speologie “Emil Racovita" Bucuresti: 235-238
• Povară I, Ponta G. (2010) Geology and Hydrology of the Jiul de Vest-Cernişoara Basins, Romania, Carbonates and Evaporites Volume 25 Number 2, page 117-126 Springer-Verlag.
• D.Badescu, 1991, Le Karst Alpin des Monts Retezat - Karstologia 17