Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1972_117_a3, author = {Ya. S. Bugrov}, title = {Properties of solutions of differential equations of higher order in terms of weight classes}, journal = {Informatics and Automation}, pages = {47--61}, publisher = {mathdoc}, volume = {117}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a3/} }
Ya. S. Bugrov. Properties of solutions of differential equations of higher order in terms of weight classes. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part IV, Tome 117 (1972), pp. 47-61. http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a3/