%0 Journal Article
%A A. F. Lubchenko
%A V. M. Nitsovich
%A N. V. Tkach
%T Dispersion of the permittivity tensor of ionic crystals in the exciton region
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1974
%P 415-423
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1974_21_3_a11/
%G ru
%F TMF_1974_21_3_a11