@article{10_21136_CMJ_1992_128335,
     author = {Bos\'ak, Miroslav and Ku\v{c}era, Milan},
     title = {Bifurcation of periodic solutions to differential inequalities in $\mathbb{R}^3$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {339--363},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {1992},
     doi = {10.21136/CMJ.1992.128335},
     mrnumber = {1179505},
     zbl = {0794.34031},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128335/}
}