Intensity dependence of hydrogen Lyman alpha and Balmer alpha lines upon cathode material of an abnormal glow dischargeM. Gemišić Adamov, M. M. Kuraica and N. KonjevićEur. Phys. J. D, 28 3 (2004) 393-398DOI: https://doi.org/10.1140/epjd/e2003-00324-1