@article{IIGUM_2012_5_4_a2,
     author = {O. V. Zubkov},
     title = {The number unary generated multi-operations with standard definitions superposition operator},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {21--26},
     year = {2012},
     volume = {5},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_4_a2/}
}