@article{DE_1986_22_2_a1,
     author = {G. A. Kurina},
     title = {Linear {Hamiltonian} systems that are not solved with respect to the derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {193--198},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_2_a1/}
}