Dimitri Surinx, George H. L. Fletcher, Marc Gyssens, Dirk Leinders, Jan Van den Bussche, Dirk Van Gucht, Stijn Vansummeren, Yuqing Wu. Relative expressive power of navigational querying on graphs using transitive closure. Logic Journal of the IGPL, 23(5):759-788, 2015. [doi]
Abstract is missing.