%0 Journal Article
%A S. V. Matveev
%A M. A. Ovchinnikov
%A M. V. Sokolov
%T Construction and properties of the $t$-invariant
%J Zapiski Nauchnykh Seminarov POMI
%D 2000
%P 207-219
%V 267
%U http://geodesic.mathdoc.fr/item/ZNSL_2000_267_a14/
%G ru
%F ZNSL_2000_267_a14