Measurement of the Hyperfine Structure of State in Hydrogen
S. R. Lundeen, P. E. Jessop, and F. M. Pipkin
Phys. Rev. Lett. 34, 377 (1975) - Published 17 February, 1975
Electron Density at the Nucleus and the Lamb Shift of Levels of Two-Electron Ions
A. M. Ermolaev
Phys. Rev. Lett. 34, 380 (1975) - Published 17 February, 1975