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Authors: M. H. Protter and H. F. Weinberger
Title: Maximum principles in differential equations
Additional book information: Prentice-Hall, Inc., Englewood Cliffs, N.J., 1967. x+261 pp. $8.00.
Reviewer: Shmuel Agmon
Journal: Bull. Amer. Math. Soc. 77 (1971), 177-178