1 C.E. Hamilton, M.A. Duncan, T.S. Zwier, J.C. Weisshaar, B.. Ellison, V.M. Bierbaum, and S.R. Leone, Chemical Physics Letters 94, (1983).
1 M.A. Duncan, V.M. Bierbaum, B.. Ellison, and S.R. Leone, The Journal of Chemical Physics 79, (1983).