1. Application of differential transformation to eigenvalue problems;Chen;Appl. Math. Comput.,1996
2. W.D. Trim, Applied Partial Differential Equations, PWS-Kent Publishing Company, Boston, MA, 1990, p. 149
3. J.S. Farlow, Partial Differential Equations for Scientists and Engineers, Wiley, New York, 1982, p. 53
4. B.F. Hildebrand, Advanced Calculations, Prentice-Hall, Englewood Cliffs, NJ, 1962, pp. 204–205