LASER COOLED, STORED ION EXPERIMENTS AT NBS AND POSSIBLE APPLICATIONS TO MICROWAVE AND OPTICAL FREQUENCY STANDARDS D.J. Wineland, J.C. Bergquist, R.E. Drullinger, H. Hemmati, W.M. Itano et F.L. Walls J. Phys. Colloques, 42 C8 (1981) C8-307-C8-313 DOI: 10.1051/jphyscol:1981838