1. Backward Waves in Annular Plasma Columns†
2. Wave Propagation in a Tubular Plasma
3. Space Charge Waves in Cylindrical Plasma Columns
4. S. Brown,Basic Data of Plasma Physics(John Wiley & Sons, Inc., New York, 1959), 1st ed., Chap. 1, p. 7.
5. F. E. Terman,Electronic and Radio Engineering(McGraw-Hill Book Company, Inc., New York, 1955), 4th ed., Chap. 17, p. 589.