@article{DBLP:journals/tods/BarceloLLW12, author = {Pablo Barcel{\'o} and Leonid Libkin and Anthony Widjaja Lin and Peter T. Wood}, title = {Expressive Languages for Path Queries over Graph-Structured Data}, journal = {ACM Trans. Database Syst.}, volume = {37}, number = {4}, year = {2012}, pages = {31}, ee = {http://doi.acm.org/10.1145/2389241.2389250}, bibsource = {DBLP, http://dblp.uni-trier.de} }