1 C.S. Wood, S.C. Bennett, D.. Cho, B.P. Masterson, J.L. Roberts, C.E. Tanner, and C.E. Wieman, Science 275, (1997).
1 L.. Young, W.. Hill, S.J. Sibener, S.D. Price, C.E. Tanner, C.E. Wieman, and S.R. Leone, Physical Review A 50, (1994).
1 C.E. Wieman, S.L. Gilbert, C.. Noecker, P.. Masterson, C.E. Tanner, C.S. Wood, D.. Cho, and M.. Stephens, in (1993).