@article {DBLP:journals/vldb/ChangYQCQ12,
	title = {{T}he exact distance to destination in undirected world},
	journal = {VLDB J.},
	volume = {21},
	number = {6},
	year = {2012},
	pages = {869-888},
	author = {Lijun Chang and Jeffrey Xu Yu and Lu Qin and Hong Cheng and Miao Qiao}
}
