Williamson, Richard E.
Multivariable mathematics : linear algebra calculus differential equations / Richard E. Williamson and Hale F. Trotter
Prentice-Hall, 1979
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Lanczos, Cornelius, 1893-
Linear differential operators
Society for Industrial and Applied Mathematics, 1996
 eBooks
Kaplan, Wilfred
Operational methods for linear systems
Addison-Wesley, 1962
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Churchill, Ruel V., 1899-1987
Operational mathematics
McGraw-Hill, 1972
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Morris, W.D.
Differential equations for engineers and applied scientists / W. D. Morris
McGraw-Hill, 1974
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