R. Bordoloi, and T. Tamuli, G. D. Baruah. 2004. “A Study on Optogalvanic- Like Effect in Discharge and Vector Representation of Transistion- Probability”. Journal of International Academy of Physical Sciences 8 (1-4):99-105. https://www.iaps.org.in/journal/index.php/journaliaps/article/view/787.