%0 Journal Article
%A V. Gerdt
%A A. Khvedelidze
%A Yu. Palii
%T On the ring of local unitary invariants for mixed $X$-states of two qubits
%J Zapiski Nauchnykh Seminarov POMI
%D 2016
%P 107-123
%V 448
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2016_448_a6/
%G en
%F ZNSL_2016_448_a6