Dr. Alok Kumar (2024) “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(3), pp. 35–47. doi: 10.1080/jvtnetwork.v30i3.60.