@article{KleinRama2014,
  author    = {Markus Klein and Juliane Rama},
  title     = {Time asymptotics of e(-ith(kappa)) for analytic matrices and analytic perturbation theory},
  journal   = {Asymptotic analysis},
  volume    = {89},
  number    = {3-4},
  pages     = {189 -- 233},
  doi       = {10.3233/ASY-141226},
  year      = {2014},
}