One-loop self-energy correction in a strong binding field
  A new scheme for the numerical evaluation of the one-loop self-energy correction to all orders in Z \alpha is presented. The scheme proposed inherits the attractive features of the standard potential-expansion method but yields a partial-wave expansion that converges more rapidly than in the other methods reported in the literature. 
Vladimir A. Yerokhin, Krzysztof Pachucki, and Vladimir M. Shabaev