References
- Cholewinski , F. M. and Haimo , D. T. 1968 . Classical analysis and generalized heat equation . SIAM Review , 10 : 67 – 80 .
- Copson , E. T. 1965 . Asymptotic Expansions , Cambridge University Press .
- Dettman , J. W. 1973 . Perturbation techniques in related differential equations . J. Diff.Equations , 14 : 547 – 558 .
- Erdelyi , A. , Magnus , W. , Oberhettinger , F. and Tricomi , F. G. 1955 . Higher Transcendental Functions II , New York : McGraw-Hill .
- Krzyżánski , M. 1971 . Partial Differential Equations of Second Order, I , Polish Scientific Publishers .
- Lo , C. Y. , Lo , C. Y. , Rosenbloom , P. C. and Widder , D. V. 1959 . Expansions in terms of heat polynomials and associated functions . Trans. Amer. Math. Soc. , 92 : 220 – 266 .