@article{volkmer:1983:ih,
    author = {Volkmer, Hans},
     title = {{I}ntegralgleichungen f\"ur periodische {L}\"osungen {H}ill'scher
              {D}ifferentialgleichungen},
   journal = {Analysis},
  fjournal = {Analysis. International Journal of Analysis and its
              Application},
    volume = {3},
      year = {1983},
    number = {1-4},
     pages = {189–203},
  language = {German},
      issn = {0174-4747},
   mrclass = {34B30 (33A55 45E99)},
  mrnumber = {MR0756114 (85h:34035)},
mrreviewer = {H. Hochstadt},
     zblno = {0497.34030}}