1. Clarck J. B., "A Hydraulic process for increasing the productivity of wells", Petroleum Division Fall Meeting, Dallas, Texas (1949). 2. Haimson B. C., Fairhurst C., "Initiation and extension of hydraulic fracturing in rocks", Soc. Petrol. Engrs. J. Sept. (1967) 310-318. 3. Hubbert M. K., Willis D. G., "Mechanics of hydraulic fracturing", Trans. AIME 210 (1957) 153-166. 4. Ribeiro P. R., de Oliveira e Sousa, J. L. A., Fernandes P. D., Caldas Leite V. L., "Hydraulic fracturing physical simulation", 15th Brazilian congress of mechanical engineering, November 22-26, Sao Paulo (1999). 5. Song I., Suh M., Won K. S., Haimson B., "A laboratory study of hydraulic fracturing breakdown pressure in tablerock sandstone", Geosciences Journal Vol. 5, No. 3 (2001) 263-271. 6. De pater C. J., Beugelsdijk L. J. L., "Experiments and numerical simulation of hydraulic fracturing in naturally fractured rock", presented at Alaska Rocks, The 40th U.S. Symposium on Rock Mechanics (2005). 7. Satoh H. S., Yamaguchi Y., "Laboratory hydraulic fracturing tests for core materials using large size hollow sylinderical specimens", The 1st International Symposium on Rockfill Dams (2009). 8. Carvalho C., Bendezu A. L., Oliveiraa F., Roehl D., Sousa Jr, C., "Finite element modeling of hydroaulic fracturing in vertical wells", Asociación Argentina de Mecánica Computacional, Vol XXIX (2012) 8571-8578. 9. Shimizu H., Murata S., IshidaT., "The distinct element analysis for hydraulic fracturing in hard rock considering fluid viscosity and particle size distribution", J. Rock Mech. Min. Sci. No. 48 (2011) 712-727. 10. Chen Z., "Implementation of the XFEM for Hydraulic Fracture Problems", 13th International Conference on Fracture, June 16-21, Beijing, China (2013). 11. Keshavarz A., Badalyan A., Johnson R., Bedrikovetsky P., "Productivity enhancement by stimulation of natural fractures around a hydraulic fracture using micro-sized proppant placement", J. Nat. Gas Sci. Eng. No. 33 (2016) 1010-1024. 12. Cheng W., Jin Y., Chen M., "Reactivation mechanism of natural fractures by hydraulic fracturing in naturally fractured shale reservoirs", J. Nat. Gas Sci. Eng., Vol. 27 (2015) 1357-1365. 13. Zhao Q., Lisjak A., Mahabadi O., Liu Q., Grasselli G., "Numerical simulation of hydraulic fracturing and associated microseismicity using finite-discrete element method", Journal of Rock Mechanics and Geotechnical Engineering 6 (2014) 574-581. 14. Ghanbari A., Rad S. S., "Development of an empirical criterion for predicting the hydraulic fracturing in the core of earth dams", Acta Geotechnica, Vol.10, No. 2 (2015) 243-254. 15. ISRM, "Suggested method for determining water content, porosity, density, absorption and related properties and swelling and slake durability index properties", Int J Rock Mech Min Sci, Vol. 16 (1979) 141-156. 16. ISRM, "Suggested methods for Determining the Uniaxial Compressive Strength and Deformability of Rock Materials", Int J Rock Mech Min Sci Geomech Abstr (1979) 99-103. 17. ISRM, "Suggested methods for determining tensile strength of rock materials", Int J Rock Mech Min Sci Geomech Abstr, Vol.15 (1978b) 99-103. 18. Kuruppu M. D., Obara Y., Ayatollahi M. R., Chong K. P., Funatsu T., "ISRM-Suggested Method for Determining the Mode I Static Fracture Toughness Using Semi-Circular Bend Specimen", Rock Mechanics and Rock Engineering, Vol. 47 (2014) 267-274. 19. Abaqus 6.10 documentation, abaqus theory manual. 20. Hoek E., Franklin J. A., "A simple triaxial cell for field or laboratory testing of rock", Imperial College of Science and Technology, University of London (1967). 21. Elkadi A., Van Mier J., "Scaled hollow-cylinder tests for studying size effect in fracture processes of concrete", fracture mechanics of concrete structures (2004) 229-236.