@conference {DBLP:conf/edbt/ZhangYQZZ12,
	title = {{I}/{O} cost minimization: reachability queries processing over massive graphs},
	booktitle = {EDBT},
	year = {2012},
	pages = {468-479},
	author = {Zhiwei Zhang and Jeffrey Xu Yu and Lu Qin and Qing Zhu and Xiaofang Zhou}
}
