1 N.T. Padial, D.W. Norcross, and L.A. Collins, Journal of Physics B: Atomic and Molecular Physics 14, (1981).
1 L.A. Collins, R.J.W. Henry, and D.W. Norcross, Journal of Physics B: Atomic and Molecular Physics 13, (1980).
1 B.P. Anderson, P.C. Haljan, C.A. Regal, D.L. Feder, L.A. Collins, C.W. Clark, and E.A. Cornell, Physical Review Letters 86, (2001).