@article{1102971786,
author = {Buchman, Edwin and Valentine, F. A.},
title = {A characterization of the parallelepiped in $E^{n}$.},
journal = {Pacific J. Math.},
volume = {35},
number = {3},
year = {1970},
pages = { 53-57},
language = {en},
url = {http://dml.mathdoc.fr/item/1102971786}
}
Buchman, Edwin; Valentine, F. A. A characterization of the parallelepiped in $E^{n}$.. Pacific J. Math., Tome 35 (1970) no. 3, pp. 53-57. http://gdmltest.u-ga.fr/item/1102971786/