@article{UZKU_2012_154_2_a3,
     author = {G. M. Polotovskiy},
     title = {V. {V.~Morozov,} {D.} {A.~Gudkov} and the first part of the $16$th {Hilbert} problem},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {31--43},
     publisher = {mathdoc},
     volume = {154},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2012_154_2_a3/}
}