@article{DAN_1961_139_2_a13,
     author = {V. Kh. Kharasakhal},
     title = {A method of investigating linear systems of differential equations with quasi-periodic coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {313--315},
     publisher = {mathdoc},
     volume = {139},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_2_a13/}
}