Jangid, Kamlesh, Devendra Kumar, and Jagdev Singh. “Influences of Polarization on Two Equal Semi-Permeable Cracks in a Piezoelectric Media”. Science & Technology Asia 25, no. 1 (March 26, 2020): 11-18. Accessed May 31, 2020. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/240313.