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@article{ARM_1985__21_4_a6, author = {Narang, T. D.}, title = {On $f$-best approximation in topological spaces}, journal = {Archivum mathematicum}, pages = {229--233}, publisher = {mathdoc}, volume = {21}, number = {4}, year = {1985}, mrnumber = {833135}, zbl = {0585.41029}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1985__21_4_a6/} }
Narang, T. D. On $f$-best approximation in topological spaces. Archivum mathematicum, Tome 21 (1985) no. 4, pp. 229-233. http://geodesic.mathdoc.fr/item/ARM_1985__21_4_a6/