@article{MZM_1974_16_6_a8,
     author = {K. Kh. Boimatov},
     title = {Sturm{\textendash}Liouville operators with matrix potentials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {921--932},
     year = {1974},
     volume = {16},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_6_a8/}
}