@article{03888332,
title = {On characterizations of inner-product spaces.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {36(50)},
year = {1984},
pages = {173-177},
zbl = {0557.46019},
language = {en},
url = {http://dml.mathdoc.fr/item/03888332}
}
Kapoor, O.P.; Prasad, Jagadish. On characterizations of inner-product spaces.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 36(50) (1984) pp. 173-177. http://gdmltest.u-ga.fr/item/03888332/