1. J.K. Zhou, Differential Transformation and Its Applications for Electrical Circuits (in Chinese), Huazhong Univ. Press, Wuhan, China, 1986
2. Application of differential transformation to eigenvalue problems;Chen;Appl. Math. Comput.,1996
3. F.B. Hildebrand, Advanced Calculus for Applications, Prentice-Hall, Englewood Cliffs, NJ, 1976, p. 387
4. M.U. Tyn, L. Debnath, Partial Differential Equations for Scientists and Engineers, Elsevier, Amsterdam, 1988, p. 73
5. H.F. Weinberger, A First Course in Partial Differential Equations with Complex Variables and Transform Methods, Blaisdell, New York, 1965, p. 384