@article{Her10b,
  author   = {M.~Herrmann},
  title    = {Heteroclinic standing waves in defocusing {DNLS} equations: variational approach via energy minimization },
  journal  = {Appl. Anal.},
  volume   = {89},
  number   = {10},
  pages    = {1591--1602},
  year     = {2010}
}