Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1966__7_4_a9, author = {Ne\v{c}as, Jind\v{r}ich and Porack\'a, Zita}, title = {On extrema of functionals}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {509--520}, publisher = {mathdoc}, volume = {07}, number = {4}, year = {1966}, mrnumber = {0208440}, zbl = {0157.22102}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1966__7_4_a9/} }
Nečas, Jindřich; Poracká, Zita. On extrema of functionals. Commentationes Mathematicae Universitatis Carolinae, Tome 07 (1966) no. 4, pp. 509-520. http://geodesic.mathdoc.fr/item/CMUC_1966__7_4_a9/