@article{10_37236_1377,
     author = {Don Coppersmith and James B. Shearer},
     title = {New bounds for union-free families of sets},
     journal = {The electronic journal of combinatorics},
     year = {1998},
     volume = {5},
     doi = {10.37236/1377},
     zbl = {0906.05001},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1377/}
}