%0 Journal Article %A V. A. Yudin %T Invariants and Chebyshev polynomials %J Trudy Instituta matematiki i mehaniki %D 2009 %P 222-239 %V 15 %N 1 %U http://geodesic.mathdoc.fr/item/TIMM_2009_15_1_a17/ %G ru %F TIMM_2009_15_1_a17