@article{DE_1968_4_3_a16,
     author = {A. D. Myshkis and {\CYRA}. {\CYRA}. Sharshanov},
     title = {The construction of the set of initial points of the integral lines contained in a half-plane for a linear {Hamiltonian} system of two equations with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {547--550},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_3_a16/}
}