@article{3068, author = {Thaheem, A.B.}, title = {Existence of best approximations}, journal = {Portugaliae mathematica}, volume = {42}, year = {1983}, pages = {435-440}, zbl = {0585.41031}, mrnumber = {0836121}, language = {en}, url = {http://dml.mathdoc.fr/item/3068} }
Thaheem, A.B. Existence of best approximations. Portugaliae mathematica, Tome 42 (1983) pp. 435-440. http://gdmltest.u-ga.fr/item/3068/