@article{10_4153_CJM_1982_065_x,
     author = {Katchalski, M. and Liu, A.},
     title = {Intersection {Patterns} of {Families} of {Convex} {Sets}},
     journal = {Canadian journal of mathematics},
     pages = {921--931},
     year = {1982},
     volume = {34},
     number = {4},
     doi = {10.4153/CJM-1982-065-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1982-065-x/}
}