Effect of long-range 1/r interactions on the Landau damping in a Bose-Fermi mixtureS. Mostafa Moniri, Heshmatollah Yavari and Elnaz DarsheshdarEur. Phys. J. Plus, 131 4 (2016) 122DOI: https://doi.org/10.1140/epjp/i2016-16122-7