| Reference |
H.A. Tasman: Correction of second order aberrations in inhomogeneous magnetic sector fields In: Organized by the Hydrocarbon Research Group, Institute of Petroleum, and A.S.T.M. Committee E. 14 and held in the University of London, 24th-26th September, 1958 /ed. J.D. Waldron, Symposium Publications Division, Pergamon Press, 1959. - pp. 36-43 |
