@article{GePP08,
  key         ={GePP08},
  author      ={R. Gentilini and C. Piazza and A. Policriti},
  title       ={Symbolic Graphs: Linear Solutions to Some Connectivity Problems},
  journal     ={Algorithmica},
  publisher   ={Springer},
  volume      ={50},
  number      ={1},
  pages       ={120-158},
  year        ={2008},
  remark      ={rsg}
}