Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1977__20_154440, author = {Moritz Armsen}, title = {A {Variational} {Proof} of the {Gauss-Bonnet} {Formula.}}, journal = {Manuscripta mathematica}, pages = {245--254}, publisher = {mathdoc}, volume = {20}, year = {1977}, zbl = {0351.53035}, url = {http://geodesic.mathdoc.fr/item/MM2_1977__20_154440/} }
Moritz Armsen. A Variational Proof of the Gauss-Bonnet Formula.. Manuscripta mathematica, Tome 20 (1977), pp. 245-254. http://geodesic.mathdoc.fr/item/MM2_1977__20_154440/