@book{belokolos:1994:aga,
    author = {Belokolos, E. D. and Bobenko, A. I. and Enol'skii, V. Z. and Its,
              A. R. and Matveev, V. B.},
     title = {Algebro-geometric Approach to Nonlinear Integrable Problems},
    series = {Springer Series in Nonlinear Dynamics},
 publisher = {Springer-Verlag},
   address = {Berlin},
      year = {1994},
     pages = {xii+337},
      isbn = {3-540-50265-3},
     zblno = {0809.35001}}