@article{10_4064_fm_120_1_7_13,
     author = {Marek Lassak},
     title = {Convex half-spaces},
     journal = {Fundamenta Mathematicae},
     pages = {7--13},
     publisher = {mathdoc},
     volume = {120},
     number = {1},
     year = {1984},
     doi = {10.4064/fm-120-1-7-13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-120-1-7-13/}
}