@article{DE_1980_16_11_a11,
     author = {Fam Fu},
     title = {Attainability of central exponents of a linear {Hamiltonian} system. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2012--2022},
     publisher = {mathdoc},
     volume = {16},
     number = {11},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_11_a11/}
}