Electron impact excitation and broadening of Ar X and Ar XIII lines Rihab Aloui, Haykel Elabidi and Sylvie Sahal-Bréchot Eur. Phys. J. D, 75 8 (2021) 218 Published online: 05 August 2021 DOI: 10.1140/epjd/s10053-021-00209-1