@article{kovacic:1986:aaf,
    author = {Kovacic, Jerald J.},
     title = {An algorithm for solving second order linear homogeneous
              differential equations},
   journal = {J. Symbolic Comput.},
  fjournal = {Journal of Symbolic Computation},
    volume = {2},
      year = {1986},
    number = {1},
     pages = {3–43},
      issn = {0747-7171},
   mrclass = {12H05 (34A30)},
  mrnumber = {MR0839134 (88c:12011)},
     zblno = {0603.68035}}