A Calculation real abundance of gaseous elements of the comet PanSTARRS C/2011 S4. Iraqi Journal of Physics, [S. l.], v. 18, n. 45, p. 21–31, 2020. DOI: 10.30723/ijp.v18i45.516. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/516.. Acesso em: 28 apr. 2024.