@article{MZM_1991_50_2_a8,
     author = {A. A. Danielyan and B. M. Levitan and A. B. Khasanov},
     title = {Asymptotic behavior of {Weyl--Titchmarsh} m-function in the case of the {Dirac} system},
     journal = {Matemati\v{c}eskie zametki},
     pages = {67--76},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_2_a8/}
}