Dr. Alok Kumar. “CONVERGENCE THEOREM AND OBTAINED EXPANSION FOR THE VECTOR FUNCTION OF SECOND ORDER DIFFERENTIAL EQUATIONS”. Journal of Validation Technology, ISSN: 1079-6630, E-I SSN: 2150-7090 UGC CARE II 30, no. 3 (August 7, 2024): 35–47. Accessed December 23, 2024. https://jvtnetwork.com/index.php/journals/article/view/60.