@article{KloedenZmorzynska2006,
  author    = {Peter E. Kloeden and Alexandra Zmorzynska},
  title     = {Lyapunov functions for linear nonautonomous dynamical equations on time scales},
  journal   = {Advances in difference equations},
  volume    = {2006},
  number    = {Article ID 69106},
  pages     = {1 -- 10},
  doi       = {10.1155/ADE/2006/69106},
  year      = {2006},
}