@article{MZM_1972_11_5_a10,
     author = {M. B. Veliev and M. G. Gasymov},
     title = {On a transformation operator for a system of {Sturm--Liouville} equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {559--567},
     publisher = {mathdoc},
     volume = {11},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_5_a10/}
}