1. Estimating the strength of rock materials;Bieniawski;J. South Afr. Inst. Min. Metall.,1974
2. ASTM, Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens, American Society for Testing and Materials, D2938-95.
3. The complete ISRM suggested methods for rock characterization, testing and monitoring: 1974–2006;ISRM,2007
4. A fuzzy model to predict the unconfined compressive strength and modulus of elasticity of a problematic rock;Gokceoglu;Eng. Appl. Artif. Intell.,2004
5. Predicting of compressive and tensile strength of limestone via genetic programming;Baykasoglu;Expert Syst. Appl.,2008