@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/}
}