Evans, Lawrence C. 2010. Partial Differential Equations. Vol. Graduate studies in mathematics. 2nd ed. Providence, R.I.: American Mathematical Society.
Farlow, Stanley J. 1993. Partial Differential Equations for Scientists and Engineers. Vol. Dover books on advanced mathematics. New York: Dover Publications.
John, Fritz. 1982. Partial Differential Equations. Vol. Applied mathematical sciences. 4th ed. New York: Springer-Verlag.
Strauss, Walter A. 2008. Partial Differential Equations: An Introduction. 2nd ed. New York: Wiley.