Sg. Karshenboim, 2-LOOP LOGARITHMIC CORRECTIONS IN THE HYDROGEN LAMB SHIFT, Journal of physics. B, Atomic molecular and optical physics, 29(2), 1996, pp. 29-31
Leading logarithmic corrections in the order alpha(2)(Z alpha)(6)m ln(
2)(Z alpha) to the Lamb shift of np(j) states and to the special diffe
rence of energies of ns(1/2) states in the hydrogen atom are evaluated
.