List of Articles Penning discharge Open Access Article Abstract Page Full-Text 1 - Simultaneous estimation of plasma parameters from spectroscopic data of neutral helium using least square fitting of CR-model Jalaj Jain Ram Prakash Gheesa Lal Vyas Udit Narayan Pal Malay Bikas Chowdhuri Ranjana Manchanda Nilanjan Halder Yaduvendra Choyal 10.1007/s40094-014-0156-2