@article{10_4153_CMB_1977_038_7,
     author = {Spencer, Joel},
     title = {Intersection {Theorems} for {Systems} of {Sets}},
     journal = {Canadian mathematical bulletin},
     pages = {249--254},
     year = {1977},
     volume = {20},
     number = {2},
     doi = {10.4153/CMB-1977-038-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-038-7/}
}