1. Jahn, R. G., Physics of Electric Propulsion, McGraw-Hill, New York, 1968, pp.188-191.
2. Liu, H., Science and Engineering of Droplets, Fundamentals and Application, Noyes Publications/William Andrew, New York, 2000, pp.49-59.
3. Applications and Products, National Nanotechnology Initiative, http://www.nano.gov/html/facts/nanoapplicationsandproducts.html [retrieved 15 Aug. 2008].
4. The current emitted by highly conducting Taylor cones