A modified Milne-Eddington approximation for a qualitative interpretation of chromospheric spectral linesA. J. Dorantes-Monteagudo, A. L. Siu-Tapia, C. Quintero-Noda and D. Orozco SuárezA&A, 659 (2022) A156DOI: https://doi.org/10.1051/0004-6361/202142810