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@article{PIM_1977_N_S_22_36_a27, author = {Endre Pap}, title = {A {Note} {On} {Orthogonal} {Expansions} {In} {Multidimensional} {Case}}, journal = {Publications de l'Institut Math\'ematique}, pages = {211 }, publisher = {mathdoc}, volume = {_N_S_22}, number = {36}, year = {1977}, url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_22_36_a27/} }
Endre Pap. A Note On Orthogonal Expansions In Multidimensional Case. Publications de l'Institut Mathématique, _N_S_22 (1977) no. 36, p. 211 . http://geodesic.mathdoc.fr/item/PIM_1977_N_S_22_36_a27/