@article{MZM_1972_12_1_a0,
     author = {E. Yu. Zakharova and S. V. Yablonskii},
     title = {Certain properties of nondegenerate superpositions in $P_k$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {3--12},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_1_a0/}
}