| 1 | Partial Differential Equations: Methods and Applications, R. McOwen, Prentice-Hall, 1996 |
| 2 | Introduction to Partial Differential Equations, G. Folland, Princeton University Press, 1976 |
| 3 | Partial Differential Equations, Fourth Edition, F. John, Springer, 1982 |
| 4 | Partial Differential Equations, L.C. Evans, AMS, 1998 |