[1] A. Friedman:
Partial Differential Equations of Parabolic Type. Prentice Hall Inc., Englewood Cliffs, 1964.
MR 0181836 |
Zbl 0144.34903
[2] O. A. Ladyzenskaja, V. A. Solonnikov, and N. N. Ural’ceva:
Linear and Quasilinear Equations of Parabolic Type. Amer. Math. Soc., Providence, 1968.
MR 0241822
[3] M. H. Protter and H. F. Weinberger:
Maximum Principles in Differential Equations. Prentice Hall Inc., Englewood Cliffs, 1967.
MR 0219861