@article{ZNSL_1997_239_a12,
     author = {V. M. Markushevich},
     title = {On the scattering by a matrix potential with a symplectic structure},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {133--139},
     year = {1997},
     volume = {239},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_239_a12/}
}