H.A. Tasman, A.J.H. Boerboom and H. Wachsmuth, Calculation of the ion optical properties of inhomogeneous magnetic sector fields Part 3: Oblique incidence and excit at curved boundaries, Z. Naturforsch. Teil A 14, 822-827 (1959)
H.A. Tasman and A.J.H. Boerboom, Calculation of the ion optical properties of inhomogeneous magnetic sector fields, including the second order aberrations in the median plane, Z. Naturforsch. Teil A 14, 121-129 (1959)
C.A. Bank, Kinetics of the isotopic exchange in the system CO2-O2 with 18O tracer in a transparent quartz vessel, J. Inorg. Nucl. Chem. 7, 145-146 (1958)