Hamza Hussein, Salman, H. A. Jaseem, and T. A. Selman. 2018. “Some Parameters Dependency on the Effective Secondary Emission Coefficient (ESEC)in Microdischarge”. Al-Qadisiyah Journal of Pure Science 20 (4), 89 - 99. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/867.