@article{MZM_2000_67_5_a17,
     author = {K. V. Emel'yanov},
     title = {On the classification problem for {Birkhoff} integrable systems with potentials of exponential type},
     journal = {Matemati\v{c}eskie zametki},
     pages = {797--800},
     publisher = {mathdoc},
     volume = {67},
     number = {5},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_5_a17/}
}