@article{DM_2005_17_4_a9,
     author = {S. A. Lozhkin},
     title = {On minimal $\pi$-circuits of closing contacts for symmetric functions with threshold~2},
     journal = {Diskretnaya Matematika},
     pages = {108--110},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2005_17_4_a9/}
}