General А. and E. Svitlichnyi, Study of gas-discharge plasma properties in mixtures of helium and argon with sulfur vapor , Low Temp. Phys. 51, 306–309, (2025) [Fiz. Nyzk. Temp. 51, 339–342, (2025)] DOI: https://doi.org/10.1063/10.0035812.