Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1972__13_1_a0, author = {Babu\v{s}ka, Ivo}, title = {Approximation by {Hill} functions. {II.}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {1--22}, publisher = {mathdoc}, volume = {13}, number = {1}, year = {1972}, mrnumber = {0305550}, zbl = {0244.41005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1972__13_1_a0/} }
Babuška, Ivo. Approximation by Hill functions. II.. Commentationes Mathematicae Universitatis Carolinae, Tome 13 (1972) no. 1, pp. 1-22. http://geodesic.mathdoc.fr/item/CMUC_1972__13_1_a0/