@article{10_37236_254,
     author = {David Ellis},
     title = {Note on generating all subsets of a finite set with disjoint unions},
     journal = {The electronic journal of combinatorics},
     year = {2009},
     volume = {16},
     number = {1},
     doi = {10.37236/254},
     zbl = {1229.05260},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/254/}
}