@article{DBLP:journals/pvldb/Shirani-MehrKS12, author = {Houtan Shirani-Mehr and Farnoush Banaei Kashani and Cyrus Shahabi}, title = {Efficient Reachability Query Evaluation in Large Spatiotemporal Contact Datasets}, journal = {PVLDB}, volume = {5}, number = {9}, year = {2012}, pages = {848-859}, ee = {http://vldb.org/pvldb/vol5/p848_houtanshirani-mehr_vldb2012.pdf}, bibsource = {DBLP, http://dblp.uni-trier.de} }