Fesen, Robert A.; Weil, Kathryn E.; Cisneros, Ignacio A.; Blair, William P.; Raymond, John C. (2018). "The Cygnus Loop's distance, properties, and environment driven morphology". Monthly Notices of the Royal Astronomical Society. 481 (2): 1786—1798. arXiv:1809.01713. doi:10.1093/mnras/sty2370.
doi.org
Fesen, Robert A.; Weil, Kathryn E.; Cisneros, Ignacio A.; Blair, William P.; Raymond, John C. (2018). "The Cygnus Loop's distance, properties, and environment driven morphology". Monthly Notices of the Royal Astronomical Society. 481 (2): 1786—1798. arXiv:1809.01713. doi:10.1093/mnras/sty2370.