1. Parsamehr H, Moarefvand P, Ataeei M (1990) Review of instability and stabilization of oil wells. Amirkabir University of Iran, Tehran, Ph.D. Dissertation
2. Awal MR, Khan MS, Mohiuddin MA, Abdulraheem A, Azeemuddin M (2001) A new approach to borehole trajectory optimization for increased hole stability. In: SPE middle east oil show. Manama, Bahrain, pp 1–11
3. Yang L, Jiang Y, Li S, Gao Y (2012) Application of the expanded distinct element method for the study of crack growth in rock-like materials under uniaxial compression. Front Struct Civ Eng 6(2):121–131
4. Nwonodi RL, Dosunmu A (2019) Effect of using transient polyaxial failure criterion in wellbore instability analysis. Geomechanics and Geoengineering 14(3):178–184
5. Van Heerden WL (1969) Stress concentration factors for the flat borehole end for use in rock stress measurements. Eng Geol 3(4):307–323