“Spectroscopic Study of the Forbidden Lines [OIII] and [SII] of Crab Nebula Supernova Remnant”.
Iraqi Journal of Science 56, no. 4c (March 7, 2025): 3564–3568. Accessed July 16, 2025.
https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/15239.