Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1953_40_a0, author = {A. A. Lyapunov}, title = {$R$-sets}, journal = {Informatics and Automation}, pages = {3--68}, publisher = {mathdoc}, volume = {40}, year = {1953}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1953_40_a0/} }
A. A. Lyapunov. $R$-sets. Informatics and Automation, $R$-sets, Tome 40 (1953), pp. 3-68. http://geodesic.mathdoc.fr/item/TRSPY_1953_40_a0/