@article{SJC_2008_2_3_a2,
     author = {Shtrakov, Slavcho},
     title = {Essential {Arity} {Gap} of {Boolean} {Functions}},
     journal = {Serdica Journal of Computing},
     pages = {249--266},
     year = {2008},
     volume = {2},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJC_2008_2_3_a2/}
}