Comment on two new collisional-radiative models for an argon plasma

Benoy, 1991, JQSRT, 46, 195, 10.1016/0022-4073(91)90024-K van der Mullen, 1990, Phys. Rep., 191, 109, 10.1016/0370-1573(90)90152-R Vlček, 1989, J. Phys. D: Appl. Phys., 22, 632, 10.1088/0022-3727/22/5/010 Vlček, 1989, J. Phys. D: Appl. Phys., 22, 623, 10.1088/0022-3727/22/5/009 van der Sijde, 1984, Phys. Lett., 101A, 491, 10.1016/0375-9601(84)90425-0 Mills, 1984, Spectrochim. Acta, 39B, 859, 10.1016/0584-8547(84)80103-2