@article{10_4153_CMB_1978_021_5,
     author = {Katchalski, Meir},
     title = {A {Helly} type {Theorem} for {Convex} {Sets}},
     journal = {Canadian mathematical bulletin},
     pages = {121--123},
     year = {1978},
     volume = {21},
     number = {1},
     doi = {10.4153/CMB-1978-021-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-021-5/}
}