1) LOGAN, J. David. Applied partial differential equations.2nd ed. New York, N.Y.: Springer, 2004.
2) EVANS, L. C. Partial Differential Equations, Graduate Studies in Mathematics, 19, AMS, 1998.
3) BASSALO, J. M. F.; CATTANI, M. S. D. Elementos de física matemática. São Paulo: Liv. da Física: Maluhy & Co, 2010-2012. Volume 3.
4) TIKHONOV, A. N.; SAMARSKII, A. A. Equations of mathematical physics. New York: Dover, 1990.
5) WEINBERGER, H. F. A first course in partial differential equations: whit complex variables and transform methods. Dover books in mathematics. 1995.