@article{KohLeu:08y,
  journal = {Ergodic Theory and Dynamical Systems},
  volume = 29,
  year = 2009,
  title = {A quantitative Mean Ergodic Theorem for uniformly convex Banach
           spaces},
  pages = {1907-1915},
  author = {Kohlenbach, Ulrich and Leu\c stean, Lauren\c tiu},
}