@article{IM2_1991_36_2_a2,
     author = {O. I. Bogoyavlenskii},
     title = {A~theorem on two commuting automorphisms, and integrable differential equations},
     journal = {Izvestiya. Mathematics },
     pages = {263--279},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1991_36_2_a2/}
}