Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1994__49_1_141558, author = {Vagn Lundsgaard Hansen}, title = {The {Magic} {World} of {Geometry} - {I.} {The} {Isoperimetric} {Problem.}}, journal = {Elemente der Mathematik}, pages = {61--65}, publisher = {mathdoc}, volume = {49}, number = {1}, year = {1994}, zbl = {0812.52004}, url = {http://geodesic.mathdoc.fr/item/ELMA_1994__49_1_141558/} }
Vagn Lundsgaard Hansen. The Magic World of Geometry - I. The Isoperimetric Problem.. Elemente der Mathematik, Tome 49 (1994) no. 1, pp. 61-65. http://geodesic.mathdoc.fr/item/ELMA_1994__49_1_141558/