Int. J. Mass Spectrom. Ion Phys.

Tuithof, H. H, & Boerboom, A. J. H. (1976). Variation of the Dispersion, Resolution and Inclination of the Focal Plane of a Single-focussing Mass Spectrometer by Use of Two Quadrupoles. Int. J. Mass Spectrom. Ion Phys., 20, 107–121.