@article{GDZPPN002083248,
title = {The Magic World of Geometry - I. The Isoperimetric Problem.},
journal = {Elemente der Mathematik},
volume = {49},
year = {1994},
pages = {61-65},
zbl = {0812.52004},
url = {http://dml.mathdoc.fr/item/GDZPPN002083248}
}
Hansen, Vagn Lundsgaard. The Magic World of Geometry - I. The Isoperimetric Problem.. Elemente der Mathematik, Tome 49 (1994) pp. 61-65. http://gdmltest.u-ga.fr/item/GDZPPN002083248/