1. The technological and commercial expansion of electric propulsion;D Lev;Acta Astronautica,2019
2. Perspectives, frontiers, and new horizons for plasma-based space electric propulsion;I Levchenko;Physics of Plasmas
3. Recent progress in research and development of hollow cathodes for electric propulsion;D Lev;Reviews of Modern Plasma Physics
4. Thermal analysis of lanthanum hexaboride hollow cathode with radiative carbon heater;Y S W Y Oshio;Proceedings of 35th International Electric Propulsion Conference,2015
5. Low current heaterless hollow cathode neutralizer for plasma propulsion-development overview;D Lev;Review of Scientific Instruments