@article{10_21136_CMJ_1977_101493,
     author = {Solomon, R. C.},
     title = {Families of sets and functions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {556--559},
     publisher = {mathdoc},
     volume = {27},
     number = {4},
     year = {1977},
     doi = {10.21136/CMJ.1977.101493},
     mrnumber = {0457218},
     zbl = {0383.04002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1977.101493/}
}