@book{KellerRoellyValleriana2011,
  author    = {Keller, Peter and Roelly, Sylvie and Valleriana, Angelo},
  title     = {On Time Duality for Markov Chains with Asborbing Boundardies},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Mathematische Statistik un},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Mathematische Statistik un},
  publisher = {Univ.},
  address   = {Potsdam},
  issn      = {1613-3307},
  pages     = {18 S.},
  year      = {2011},
  language  = {en}
}