APA ציטוט

Schafer, P. (1988). Maximum principles and eigenvalue problems in partial differential equations. Longman.

Chicago Edition Citation

Schafer, P.W. Maximum Principles and Eigenvalue Problems in Partial Differential Equations. Longman, 1988.

ציטוט MLA

Schafer, P.W. Maximum Principles and Eigenvalue Problems in Partial Differential Equations. Longman, 1988.