by CHAPPELL, S.E., WOLFSON, M.R., SHAFFER, T.H.
Published in Respiratory medicine (01.07.2001)

by Chappell, S. E., Humphreys, J. C.
Published in IEEE transactions on nuclear science (01.01.1972)

by Humphreys, J.C., Chappell, S.E., McLaughlin, W.L., Jarrett, R.D.
Published in Radiation physics and chemistry (1977)

by Chappell, S E, Sparrow, J H
Published in Radiation research (01.11.1967)

by Chappell, S. E., Humphreys, J. C., Motz, J. W., Berger, M. J., Seltzer, S. M.
Published in IEEE transactions on nuclear science (01.06.1968)