Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE. :974-978 vol.2 1991
Conference Record of the 1991 IEEE Particle Accelerator Conference Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE. :952-954 vol.2 1991