Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1991_200_a3, author = {V. A. Baikov and R. K. Gazizov and N. Kh. Ibragimov}, title = {Approximate symmetries and preservation laws}, journal = {Informatics and Automation}, pages = {35--45}, publisher = {mathdoc}, volume = {200}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1991_200_a3/} }
V. A. Baikov; R. K. Gazizov; N. Kh. Ibragimov. Approximate symmetries and preservation laws. Informatics and Automation, Number theory, algebra, analysis and their applications, Tome 200 (1991), pp. 35-45. http://geodesic.mathdoc.fr/item/TRSPY_1991_200_a3/