General polytropic magnetofluid under self-gravity: Voids and shocks
Keywords: سحابی های سیاره ای: به طور کلی; 98.38.-j; 98.38.Fs; 98.38.Hv; 98.38.Ly; 98.38.Mz; 95.30.Qd; 52.35.Tc; 97.10.Jb; ISM: bubbles; MHD; Planetary nebulae: general; Shock waves; Star: winds, outflows; Supernova remnants;