@article{10_4064_sm_107_2_205_211,
     author = {Henryk \.Zo{\l}\k{a}dek},
     title = {On first integrals for polynomial differential equations on the line},
     journal = {Studia Mathematica},
     pages = {205--211},
     publisher = {mathdoc},
     volume = {107},
     number = {2},
     year = {1993},
     doi = {10.4064/sm-107-2-205-211},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-107-2-205-211/}
}