Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1951__6_140562, author = {E. Trost}, title = {Beweis einer {Minimaleigenschaft} des {Quadrates.}}, journal = {Elemente der Mathematik}, pages = {26--28}, publisher = {mathdoc}, volume = {6}, year = {1951}, zbl = {0042.16502}, url = {http://geodesic.mathdoc.fr/item/ELMA_1951__6_140562/} }
E. Trost. Beweis einer Minimaleigenschaft des Quadrates.. Elemente der Mathematik, Tome 6 (1951), pp. 26-28. http://geodesic.mathdoc.fr/item/ELMA_1951__6_140562/