%0 Journal Article
%A V. M. Deundyak
%A I. B. Simonenko
%A Chin' Ngok Min'
%T Symbols and a~homotopy classification of families of one-dimensional singular operators with piecewise-continuous coefficients
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1988
%P 17-27
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1988_12_a2/
%G ru
%F IVM_1988_12_a2