@article{slavyanov:1997:soa,
    author = {Slavyanov, S. {\relax{Yu}}. and Veshev, N. A.},
     title = {Structure of avoided crossings for eigenvalues related to
              equations of {H}eun's class},
   journal = {J. Phys. A},
  fjournal = {Journal of Physics. A. Mathematical and General},
    volume = {30},
      year = {1997},
    number = {2},
     pages = {673–687},
      issn = {0305-4470},
     coden = {JPHAC5},
   mrclass = {34E05 (34B30 34L20)},
  mrnumber = {MR1442883 (98e:34099)},
mrreviewer = {{\'E}ric Delabaere},
       doi = {10.1088/0305-4470/30/2/027},
     zblno = {0948.34059}}