@article{Leu:07b,
  author = {Leu\c stean, Lauren\c tiu},
  title = {Rates of asymptotic regularity for Halpern iterations of nonexpansive
           mappings},
  pages = {1680-1691},
  note = {in C.S. Calude, G. Stefanescu, and M. Zimand (Eds.): Combinatorics and
          Related Areas. A Collection of Papers in Honour of the 65th Birthday
          of Ioan Tomescu.},
  volume = 13,
  year = 2007,
  journal = {Journal of Universal Computer Science},
  number = 11,
}