Excessive hydrogen and deuterium Balmer lines broadening in a hollow cathode glow dischargesN. M. Šišović, G. Lj. Majstorović and N. KonjevićEur. Phys. J. D, 32 3 (2005) 347-354DOI: https://doi.org/10.1140/epjd/e2004-00192-1