Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1970__11_4_a10, author = {Babu\v{s}ka, Ivo}, title = {Approximation by {Hill} functions}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {787--811}, publisher = {mathdoc}, volume = {11}, number = {4}, year = {1970}, mrnumber = {0292309}, zbl = {0215.46404}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1970__11_4_a10/} }
Babuška, Ivo. Approximation by Hill functions. Commentationes Mathematicae Universitatis Carolinae, Tome 11 (1970) no. 4, pp. 787-811. http://geodesic.mathdoc.fr/item/CMUC_1970__11_4_a10/