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@article{NUMA_1987__51_133211, author = {H. Sp\"ath and G.A. Watson}, title = {On {Orthogonal} {Linear} ...1 {Approximation.}}, journal = {Numerische Mathematik}, pages = {531--544}, publisher = {mathdoc}, volume = {51}, year = {1987}, zbl = {0633.65010}, url = {http://geodesic.mathdoc.fr/item/NUMA_1987__51_133211/} }
H. Späth; G.A. Watson. On Orthogonal Linear ...1 Approximation.. Numerische Mathematik, Tome 51 (1987), pp. 531-544. http://geodesic.mathdoc.fr/item/NUMA_1987__51_133211/