Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1994_24_1a_0, author = {Had\v{z}i\'c Olga}, title = {On best approximations for multivalued mappings in pseudoconvex metric spaces}, journal = {Novi Sad Journal of Mathematics}, pages = {1-12}, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1994}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1994_24_1a_0/} }
Hadžić Olga. On best approximations for multivalued mappings in pseudoconvex metric spaces. Novi Sad Journal of Mathematics, Tome 24 (1994) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1994_24_1a_0/