Plasma excitation dispersion in non-degenerate quantum wire over liquid heliumTatiana N. Antsygina, Konstantin A. Chishko, Igor A. Degtyaryov, Igor I. Poltavsky, Sviatoslav S. Sokolov and Nelson StudartEur. Phys. J. B, 90 5 (2017) 79DOI: https://doi.org/10.1140/epjb/e2017-70627-5