bibtex from MathSciNet.
@article {MR2232199,
    AUTHOR = {Feng, Ruyong and Gao, Xiao-Shan},
     TITLE = {A polynomial time algorithm for finding rational general
              solutions of first order autonomous {ODE}s},
   JOURNAL = {J. Symbolic Comput.},
  FJOURNAL = {Journal of Symbolic Computation},
    VOLUME = {41},
      YEAR = {2006},
    NUMBER = {7},
     PAGES = {739--762},
      ISSN = {0747-7171},
   MRCLASS = {65L07 (34A09 34A25)},
  MRNUMBER = {2232199 (2006m:65135)},
       DOI = {10.1016/j.jsc.2006.02.002},
       URL = {http://dx.doi.org/10.1016/j.jsc.2006.02.002},
}