Spectral energy distribution of M-subdwarfs: A study of their atmospheric propertiesA. S. Rajpurohit, C. Reylé, F. Allard, D. Homeier, A. Bayo, O. Mousis, S. Rajpurohit and J. G. Fernández-TrincadoA&A, 596 (2016) A33DOI: https://doi.org/10.1051/0004-6361/201526776