@article{10_21136_CMJ_1990_102381,
     author = {Medve\v{d}, Milan},
     title = {On a codimension 3 bifurcation of plane vector fields with $Z_2$ symmetry},
     journal = {Czechoslovak Mathematical Journal},
     pages = {295--310},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1990},
     doi = {10.21136/CMJ.1990.102381},
     mrnumber = {1046295},
     zbl = {0724.34014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102381/}
}