1. P.E. Blackburn, C.E. Johnson, IAEA-SM-190/50.
2. C.E. Johnson, I. Johnson, P.E. Blackburn, C.E. Crouthamel, Reactor Technology 15 (4), Winter 1972–1973.
3. The uranium-plutonium-oxygen ternary phase diagram
4. A study of the ternary system U02-Pu02-Pu203
5. T.L. Markin, R.J. Bones, AERE-R 4042, 1962.