1. Cutremurul de pămnt din Romnia de la 4 martie 1977;Bălan,1982
2. Alunecările §i stabilitatea versanilor agricoli;Bally,1977
3. Effects of the March 4, 1977 earthquake on slope modelling in the surroundings of the Pătrlagele Research Station (the Buzău Carpathians and Sub-Carpathians);Bălteanu;Studia Geomorph. Carpato-Balcanica (Krakow),1979
4. The importance of mass movement in the Romanian Subcarpathians;Bălteanu;Z.Geomorph.,1986
5. Harta proceselor actuale de modelare a'reliefului;Bălteanu,1975