فهرس المقالات Uma Maheswara Rao Velagapudi المقاله 1 - String cosmological models with bulk viscosity in Nordtvedt's general scalar-tensor theory of gravitation 10.1186/2251-7235-7-50 Uma Maheswara Rao Velagapudi Neelima Davuluri Journal of Theoretical and Applied Physics , العدد 1 , السنة 0 , زمستان 2013
