Petrescu, G. VII Jena 1962, ESC Proceedings, External Organizations;
Radu, C. VII Jena 1962, ESC Proceedings, External Organizations;
http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:1503973 (Supplementary material)
esc_07_27-31.pdf (Any fulltext), 4MB
Petrescu, G., Radu, C. (1964): La séismicité du territoire de la République Populaire Roumaine, (ESC-Proceedings ; 7).