Semi-classical theory of collisional depolarization of spectral lines by atomic hydrogen I. Application to p states of neutral atomsM. Derouich, S. Sahal-Bréchot, P. S. Barklem and B. J. O'MaraA&A, 404 2 (2003) 763-773DOI: https://doi.org/10.1051/0004-6361:20030568