Παραπομπή APA

Payne, L. E. (1975). Improperly posed problems in partial differential equations. Philadelphia: Society for Industrial and Applied Mathematics.

Παραπομπή Chicago Style

Payne, L. E. Improperly Posed Problems in Partial Differential Equations. Philadelphia: Society for Industrial and Applied Mathematics, 1975.

Παραπομπή MLA

Payne, L. E. Improperly Posed Problems in Partial Differential Equations. Philadelphia: Society for Industrial and Applied Mathematics, 1975.

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