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},
}