@article{SoffSchlueterMuelleretal.2006,
  author    = {Gerhard Soff and Paul Schl{\"u}ter and Berndt M{\"u}ller and Walter Greiner},
  title     = {Self-energy of electrons in critical fields},
  journal   = {Physical review letters},
  volume    = {48},
  number    = {21},
  pages     = {1465 -- 1468},
  url       = {http://link.aps.org/abstract/PRL/v48/p1465},
  year      = {2006},
}