@article{TMF_2015_184_2_a1,
     author = {A. B. Shabat},
     title = {Difference {Schr\"odinger} equation and quasisymmetric polynomials},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {200--211},
     publisher = {mathdoc},
     volume = {184},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2015_184_2_a1/}
}