@article{VMUMM_2013_3_a9,
     author = {D. Yu. Panin},
     title = {Completeness criteria for some classes of unary monotone functions in $P_k$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {57--61},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2013_3_a9/}
}