by Fox, J N, Fitzwilson, R L, Thomas, E W
Published in Journal of physics. E, Scientific instruments (01.01.1970)

by Fitzwilson, R. L., Comisar, G. G.
Published in IEEE transactions on nuclear science (01.12.1974)

by Fitzwilson, R. L., Bernstein, M. J., Alston, T. E.
Published in IEEE transactions on nuclear science (01.12.1974)

by Singletary, L. D., Nielsen, L. C., Clement, D. M., Wuller, C. E., Fitzwilson, R. L.
Published in IEEE transactions on nuclear science (01.12.1974)