Study of the far wing of the Balmer α line of hydrogen perturbed by collisions with protons - Balmer α J. F. Kielkopf, N. F. Allard and A. Decrette Eur. Phys. J. D, 18 1 (2002) 51-59 Published online: 15 January 2002 DOI: 10.1140/e10053-002-0006-7