@article{ZNSL_2018_473_a12,
     author = {V. B. Matveev and A. O. Smirnov},
     title = {Two-phase periodic solutions to the {AKNS} hierarchy equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {205--227},
     publisher = {mathdoc},
     volume = {473},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_473_a12/}
}