@conference {Gong2012,
	title = {Exploring spatiotemporal characteristics of intra-urban trips using metro smartcard records},
	booktitle = {Proceedings - 2012 20th International Conference on Geoinformatics, Geoinformatics 2012},
	year = {2012},
	note = {施引文献 3},
	doi = {10.1109/Geoinformatics.2012.6270316},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84867135262\&partnerID=40\&md5=d2996c32a1f256018e674b5a47da4553},
	author = {Gong, Y. and Y. Liu and Y. Lin and J. Yang and Duan, Z. and G. Li}
}
