1. Review of fracture toughness testing of rock;Ouchterlony;SM Arch.,1982
2. New methods of measuring fracture toughness on rock cores;Ouchterlony,1983
3. Fracture toughness testing of limestone;Schmidt;Expl Mech.,1976
4. Static and dynamic fracture behaviour of oil shale;Costin,1981
5. Extension of the compliance and stress intensity formulas for the single edge crack round bar in bending;Ouchterlony,1981