1. ASTM 1983. Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock (D2845). American Society for Testing and Materials, USA.
2. ASTM 1996. Standard Test Method for Splitting Tensile Strength of Intact Rock Core Specimens (D3967). Annual Book of ASTM Standards, Vol. 03.01 & 14.02. ASTM, USA.
3. ASTM 2002. Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens (D2938). Annual Book of ASTM Standards, Vol. 04.08 & 03.01 & 14.02. ASTM, USA.
4. ASTM 2003. Standard Test Method for Determination of the Point Load Strength Index of Rock (D5731). Annual Book of ASTM Standards, Vol. 04.08 & 04.09 & 03.01. ASTM, USA.
5. Comparison of intact rock strength criteria for pragmatic design;Bertuzzi;Journal of Geotechnical and Geoenvironmental Engineering,2016