Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1958__62_177031, author = {Raymond M. Redheffer}, title = {Maximum {Principles} and {Duality.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {56--75}, publisher = {mathdoc}, volume = {62}, year = {1958}, zbl = {0094.29901}, url = {http://geodesic.mathdoc.fr/item/MOMA_1958__62_177031/} }
Raymond M. Redheffer. Maximum Principles and Duality.. Monatshefte für Mathematik, Tome 62 (1958), pp. 56-75. http://geodesic.mathdoc.fr/item/MOMA_1958__62_177031/