1. Ardelean, M., 2010. Piule-Iorgovanu Mountains: A geomorphology study. Ph.D. Thesis, Babes-Bolyai University, Cluj-Napoca, Romania (in Romanian).
2. French Alps Karst: study methods and recent advances;Audra,2001
3. Northwest European palaeoclimate as indicated by growth frequency variations of secondary calcite deposits;Baker;Palaeogeogr. Palaeocl.,1993
4. Considerations on a preliminary structural model of the South Carpathian crystalline east of the Olt river;Balintoni;D. S. Inst. Geol. Geofiz.,1986
5. Geology of the Făgăraș Mountains crest area between the Negoiu and Tătaru peaks;Balintoni;Rom. J. Tect. Reg. Geol.,1993