%0 Journal Article %A I. E. Simonov %T From a Letter to the Editor %J Trudy Instituta matematiki i mehaniki %D 2012 %P 328 %V 18 %N 4 %U http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a28/ %G ru %F TIMM_2012_18_4_a28