@article{TDM_2007_10_a10,
     author = {V. G. Nikonov},
     title = {On the existence of minimal but not shortest disjunctive normal form},
     journal = {Trudy po diskretnoj matematike},
     pages = {188--201},
     publisher = {mathdoc},
     volume = {10},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2007_10_a10/}
}