@article{AM2_1971__6_136185,
     author = {F. NEUMAN},
     title = {L2-Solutions of y},
     journal = {Aequationes mathematicae},
     pages = {162--169},
     publisher = {mathdoc},
     volume = {6},
     year = {1971},
     zbl = {0225.34022},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136185/}
}