@article{DE_2001_37_2_a7,
     author = {G. A. Kurina and G. V. Martynenko},
     title = {On the {Reducibility} of a {Nonnegatively} {Hamiltonian} {Periodic} {Operator} {Function} in a {Real} {Hilbert} {Space} to a {Block} {Diagonal} {Form}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {212--217},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_2_a7/}
}