by Kelsey, C A, Deluca, P M, McCullough, E C, Spalek, G C, Chenevert, G M, Nickles, R J
Published in Physics in medicine & biology (01.11.1972)

by Kelsey, C A, Boone, M L, Hevezi, J M, Wiley, Jr, A L, Spalek, G C
Published in Radiology (01.03.1971)