@article {Wu2014,
	title = {Intra-urban human mobility and activity transition: Evidence from social media check-in data},
	journal = {PLoS ONE},
	volume = {9},
	number = {5},
	year = {2014},
	note = {施引文献 15},
	doi = {10.1371/journal.pone.0097010},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84901268803\&partnerID=40\&md5=98c0e1cc7ae3c5d64ff902973be1faa4},
	author = {L. Wu and Zhi, Y. and Sui, Z. and Y. Liu}
}
