@article{RM_1997_52_5_a8,
     author = {S. P. Novikov and I. A. Dynnikov},
     title = {Discrete spectral symmetries of low-dimensional differential operators and difference operators on regular lattices and two-dimensional manifolds},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1057--1116},
     publisher = {mathdoc},
     volume = {52},
     number = {5},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1997_52_5_a8/}
}