Voir la notice de l'article dans Czech Digital Mathematics Library
@article{CMJ_1998__48_2_a5, author = {O'Regan, Donal}, title = {Singular {Dirichlet} boundary value problems. {II:} {Resonance} case}, journal = {Czechoslovak Mathematical Journal}, pages = {269--289}, publisher = {mathdoc}, volume = {48}, number = {2}, year = {1998}, mrnumber = {1624319}, zbl = {0957.34016}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/CMJ_1998__48_2_a5/} }
O'Regan, Donal. Singular Dirichlet boundary value problems. II: Resonance case. Czechoslovak Mathematical Journal, Tome 48 (1998) no. 2, pp. 269-289. https://geodesic-test.mathdoc.fr/item/CMJ_1998__48_2_a5/