P. P. Shinde, P. P. Patil, M. V. Takale, and S. D. Patil, “Self-Focusing of Gaussian Laser Beam in ‎Unmagnetized Plasma Described by Kappa ‎Distribution”, J Theor Appl phys, vol. 20, no. 1, Feb. 2026, doi: 10.57647/jtap.2026.2001.02.