Sewell, M. J. (1987). Maximum and minimum principles: A unified approach, with applications. Cambridge University Press. https://doi.org/10.1017/CBO9780511569234
Chicago-Zitierstil (17. Ausg.)Sewell, M. J. Maximum and Minimum Principles: A Unified Approach, with Applications. Cambridge: Cambridge University Press, 1987. https://doi.org/10.1017/CBO9780511569234.
MLA-Zitierstil (9. Ausg.)Sewell, M. J. Maximum and Minimum Principles: A Unified Approach, with Applications. Cambridge University Press, 1987. https://doi.org/10.1017/CBO9780511569234.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.