%0 Journal Article %A V. B. Bobrov %A S. A. Triger %T Bose–Einstein condensate and singularities of the frequency dispersion of the permittivity in a disordered Coulomb system %J Teoretičeskaâ i matematičeskaâ fizika %D 2018 %P 468-480 %V 194 %N 3 %U http://geodesic.mathdoc.fr/item/TMF_2018_194_3_a7/ %G ru %F TMF_2018_194_3_a7