Chandra, Poonam, Chevalier, Roger A., Chugai, Nikolai, Milisavljevic, Dan, and Fransson, Claes. Supernova Interaction with a Dense Detached Shell in SN 2001em. Retrieved from https://par.nsf.gov/biblio/10268417. The Astrophysical Journal 902.1 Web. doi:10.3847/1538-4357/abb460.

Chandra, Poonam, Chevalier, Roger A., Chugai, Nikolai, Milisavljevic, Dan, & Fransson, Claes. Supernova Interaction with a Dense Detached Shell in SN 2001em. The Astrophysical Journal, 902 (1). Retrieved from https://par.nsf.gov/biblio/10268417. https://doi.org/10.3847/1538-4357/abb460

Chandra, Poonam, Chevalier, Roger A., Chugai, Nikolai, Milisavljevic, Dan, and Fransson, Claes. "Supernova Interaction with a Dense Detached Shell in SN 2001em". The Astrophysical Journal 902 (1). Country unknown/Code not available. https://doi.org/10.3847/1538-4357/abb460. https://par.nsf.gov/biblio/10268417.

@article{osti_10268417,
place = {Country unknown/Code not available}, title = {Supernova Interaction with a Dense Detached Shell in SN 2001em}, url = {https://par.nsf.gov/biblio/10268417}, DOI = {10.3847/1538-4357/abb460}, abstractNote = {}, journal = {The Astrophysical Journal}, volume = {902}, number = {1}, author = {Chandra, Poonam and Chevalier, Roger A. and Chugai, Nikolai and Milisavljevic, Dan and Fransson, Claes}, editor = {null} }