Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1979_244_4_a12, author = {Y. P. Popov and P. D. Krut'ko}, title = {Symmetry in automatic control systems}, journal = {Doklady Akademii Nauk}, pages = {842--845}, publisher = {mathdoc}, volume = {244}, number = {4}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1979_244_4_a12/} }
Y. P. Popov; P. D. Krut'ko. Symmetry in automatic control systems. Doklady Akademii Nauk, Tome 244 (1979) no. 4, pp. 842-845. http://geodesic.mathdoc.fr/item/DAN_1979_244_4_a12/