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2. Al-Shayea, N., Khan, K. “Fracture Toughness Envelope of a Limestone Rock at High Confining Pressure and Temperature”, 10th International Conference on Fracture, Hawaii, 2–6 December 2001, Abstract: Delegate Manual, p. 498; Full paper: CD-Rom “Advances in Fracture Research — Proceedings of ICF 10”, Posters, 2nd paper.
3. Effects of confining pressure and temperature on mixed-mode (I–II) fracture toughness of a limestone rock formation;Al-Shayea;Int. J. Rock Mech. Rock Sci.,2000
4. Fracture toughness vs. tensile strength reservoir rocks from Saudi Arabia;Al-Shayea,2001
5. Combined mode fracture via the cracked Brazilian disk;Atkinson;Int. J. Fract.,1982