Supernova Propagation in the Circumstellar and Interstellar Medium
  We describe the propagation of supernova shocks within the surrounding medium, which may be due to mass-loss from the progenitor star. The structure and density profile of the ejected material and surrounding medium are considered. Shock wave interaction with clouds and wind-bubbles, and issues relevant to cosmic rays are briefly discussed. 
Vikram V. Dwarkadas
astro-ph.HE