@article{UFA_2011_3_2_a9,
     author = {A. B. Shabat and Z. S. Elkanova},
     title = {Commuting differential operators in two-dimension},
     journal = {Ufa mathematical journal},
     pages = {89--95},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2011_3_2_a9/}
}