Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1982__18_3_a2, author = {Duda, Jarom{\'\i}r}, title = {A functional characterization of parallelogram spaces}, journal = {Archivum mathematicum}, pages = {129--132}, publisher = {mathdoc}, volume = {18}, number = {3}, year = {1982}, mrnumber = {682100}, zbl = {0515.08004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1982__18_3_a2/} }
Duda, Jaromír. A functional characterization of parallelogram spaces. Archivum mathematicum, Tome 18 (1982) no. 3, pp. 129-132. http://geodesic.mathdoc.fr/item/ARM_1982__18_3_a2/