1. A.H.Jaffey, C.A.Mallman, J.Suarez-Etchepare and T.Suter, ANL-6222.
2. L.Lagata, C.A.Mailman, C.Molina-Vedia, J.Peyre and J.Suarez-Etchepare, Proceedings of Second UN Geneva Conference,.1958, Vol. 14, p.445.
3. K.M.Bisgard, Nucl.Instr.Meth. 22, 221 (1963)
4. O.Kofoed-Hansen, J.Linhard and O.B.Nielsen, Mat.Fys.Medd.Dan.Vid. Selsk, 25 (No. 16) (1950)
5. O.B.Nielsen and O.Kofoed-Hansen, Mat.Fys.Medd.Dan.Vid.Selsk. 29, (No. 6) (1955)