1. Aydan, Ö. (1989): The stabilisation of rock engineering structures by rockbolts. Ph.D. Thesis, Nagoya University, Japan.
2. Rapport de recherche;J. J. Azuar,1977
3. Bjurström, S. (1974): Shear strength of hard rock jointed reinforced by grouted untensioned bolts. In: Proc., 3rd ISRM Congress, Denver, USA, 1194?1199.
4. Di Prisco, M. (1989): Sul comportamento a taglio delle barre d'armatura nel calcestruzzo. L'azione di spinotto: Risultati sperimentali e modellazione matematica. Doctorate Thesis, Politecnico di Milano, Italia.
5. Dight, P. M. (1983): Improvements to the stability of rock walls in open pit mines. Ph.D. Thesis, Monash University, Australia.