@article{flaschka:1980:msd,
    author = {Flaschka, Hermann and Newell, Alan C.},
     title = {Monodromy- and spectrum-preserving deformations. {I}},
   journal = {Comm. Math. Phys.},
  fjournal = {Communications in Mathematical Physics},
    volume = {76},
      year = {1980},
    number = {1},
     pages = {65–116},
      issn = {0010-3616},
     coden = {CMPHAY},
   mrclass = {35Q20 (14D05 58F07 81C05)},
  mrnumber = {MR0588248 (82g:35103)},
mrreviewer = {H{\'e}l{\`e}ne Airault},
       url = {http://projecteuclid.org/Dienst/UI/1.0/Display/euclid.cmp/1103908189},
     zblno = {0439.34005}}