@article{SIGMA_2006_2_a92,
     author = {Vsevolod E. Adler and Alexey B. Shabat},
     title = {On the {One} {Class} of {Hyperbolic} {Systems}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2006},
     volume = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2006_2_a92/}
}