فهرس المقالات Cosmic strings حرية الوصول المقاله صفحة الملخص نص كامل 1 - String cosmological models with bulk viscosity in Nordtvedt's general scalar-tensor theory of gravitation Uma Maheswara Rao Velagapudi Neelima Davuluri 10.1186/2251-7235-7-50 حرية الوصول المقاله صفحة الملخص نص كامل 2 - String cloud and domain walls with quark matter for plane symmetric cosmologicalmodel in bimetric theory Pradyumn Kumar Sahoo Bivudutta Mishra 10.1186/2251-7235-7-12