Stratification of physical parameters in a C-class solar flare using multiline observations R. Yadav, C. J. Díaz Baso, J. de la Cruz Rodríguez, F. Calvo and R. Morosin A&A, 649 (2021) A106 Published online: 21 May 2021 DOI: 10.1051/0004-6361/202039857