@article{TMF_2021_206_2_a1,
     author = {Z. Amjad and D. Khan},
     title = {Binary {Darboux} transformation for a~negative-order {AKNS} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {149--163},
     year = {2021},
     volume = {206},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2021_206_2_a1/}
}