@article{DAN_1963_151_6_a5,
     author = {V. I. Derguzov and V. A. Yakubovich},
     title = {Existence of solutions of linear {Hamiltonian} equations with unbounded operator coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1264--1267},
     publisher = {mathdoc},
     volume = {151},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_6_a5/}
}