@article{10_37236_1488,
     author = {C. H. C. Little and A. E. Campbell},
     title = {Evolutionary families of sets},
     journal = {The electronic journal of combinatorics},
     year = {2000},
     volume = {7},
     doi = {10.37236/1488},
     zbl = {0940.05066},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1488/}
}