@article{VMUMM_2008_6_a4,
     author = {V. S. Polovnikov},
     title = {Problem of checking the functional completeness in the class of piecewise parallel functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {31--35},
     publisher = {mathdoc},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2008_6_a4/}
}