Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1987_180_a32, author = {V. I. Burenkov}, title = {Approximation by infinitely differentiable functions with preservation of boundary values}, journal = {Informatics and Automation}, pages = {68--70}, publisher = {mathdoc}, volume = {180}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a32/} }
V. I. Burenkov. Approximation by infinitely differentiable functions with preservation of boundary values. Informatics and Automation, Theory of functions and related questions of analysis, Tome 180 (1987), pp. 68-70. http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a32/