Παραπομπή APA

Schaefer, P. W. (1988). Maximum principles and eigenvalue problems in partial differential equations. Essex: Longman Scientific & Technical.

Παραπομπή Chicago Style

Schaefer, P. W. Maximum Principles and Eigenvalue Problems in Partial Differential Equations. Essex: Longman Scientific & Technical, 1988.

Παραπομπή MLA

Schaefer, P. W. Maximum Principles and Eigenvalue Problems in Partial Differential Equations. Essex: Longman Scientific & Technical, 1988.

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