Optical and electrical analyses of DC positive corona discharge in N2/O2/CO2 gas mixturesN. Merbahi, A. Abahazem, D. Dubois, O. Eichwald and M. YousfiEur. Phys. J. Appl. Phys., 42 1 (2008) 55-61DOI: https://doi.org/10.1051/epjap:2008035