@article{GDZPPN002025310, title = {L2-Solutions of y" = q (t) y and a Functional Equation}, journal = {Aequationes mathematicae}, volume = {7}, year = {1971}, pages = {162-169}, zbl = {0225.34022}, url = {http://dml.mathdoc.fr/item/GDZPPN002025310} }
NEUMAN, F. L2-Solutions of y" = q (t) y and a Functional Equation. Aequationes mathematicae, Tome 7 (1971) pp. 162-169. http://gdmltest.u-ga.fr/item/GDZPPN002025310/