@article{UZMU_1951_148_148_a10,
     author = {G. Solntzev},
     title = {On stability according to {Lyapunov} of the equilibrium positions of a system of two differential equations in the case of discontinuous right hand sides},
     journal = {Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta},
     pages = {144--180},
     publisher = {mathdoc},
     volume = {148},
     number = {148},
     year = {1951},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZMU_1951_148_148_a10/}
}