@inproceedings{VarLauYua2013, title={Scalable Randomized Patrolling for Securing Rapid Transit Networks}, author={Varakantham, Pradeep and Lau, Hoong Chuin and Yuan, Zhi}, booktitle={Proc. Innovative Applications for Artificial Intelligence (IAAI)}, pages={1563--1568}, year={2013}, publisher={AAAI Press} }