1. Dawson, P.H.: ‘Quadrupole mass spectrometry and its applications’, (AIP New York 1995)
2. Quadropole gas analysers
3. Taylor, S., Syms, R.R.A., Dorey, H.A., and Tate, T.J.: ‘Improvements in and relating to quadrupole mass spectrometers’, British, (9, 506, 972)
4. Fabrication of a microengineered quadrupole electrostatic lens