Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1991_5_4_a0, author = {Sever S. Dragomir}, title = {Best {Approximation} in {Linear} {Spaces} {Endowed} with {Subinner} {Product}}, journal = {Mathematica balkanica}, pages = {271}, publisher = {mathdoc}, volume = {5}, number = {4}, year = {1991}, url = {http://geodesic.mathdoc.fr/item/MABA_1991_5_4_a0/} }
Sever S. Dragomir. Best Approximation in Linear Spaces Endowed with Subinner Product. Mathematica balkanica, Tome 5 (1991) no. 4, p. 271. http://geodesic.mathdoc.fr/item/MABA_1991_5_4_a0/