@article{CMJ_2006__56_3_a17,
     author = {Schulze-Halberg, Axel},
     title = {A simple method for constructing non-liouvillian first integrals of autonomous planar systems},
     journal = {Czechoslovak Mathematical Journal},
     pages = {987--999},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {2006},
     mrnumber = {2261671},
     zbl = {1164.34396},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/CMJ_2006__56_3_a17/}
}