EngelfrietH07'

@article{DBLP:journals/lmcs/EngelfrietH07,
  author    = {Joost Engelfriet and
               Hendrik Jan Hoogeboom},
  title     = {Automata with Nested Pebbles Capture First-Order Logic with
               Transitive Closure},
  journal   = {Logical Methods in Computer Science},
  volume    = {3},
  number    = {2},
  year      = {2007},
  ee        = {http://dx.doi.org/10.2168/LMCS-3(2:3)2007},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}