Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1986__22_4_a1, author = {Narang, T. D.}, title = {Approximation relative to an ultra function}, journal = {Archivum mathematicum}, pages = {181--186}, publisher = {mathdoc}, volume = {22}, number = {4}, year = {1986}, mrnumber = {868532}, zbl = {0608.41016}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1986__22_4_a1/} }
Narang, T. D. Approximation relative to an ultra function. Archivum mathematicum, Tome 22 (1986) no. 4, pp. 181-186. http://geodesic.mathdoc.fr/item/ARM_1986__22_4_a1/