@article {Liu2001797,
	title = {A design pattern in GIS software development: Filter and refine},
	journal = {Beijing Daxue Xuebao Ziran Kexue Ban/Acta Scientiarum Naturalium Universitatis Pekinensis},
	volume = {37},
	number = {6},
	year = {2001},
	note = {施引文献 0},
	pages = {797-803},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0035510925\&partnerID=40\&md5=699d4dbfa051c11aa465afc4f14a1c29},
	author = {Y. Liu and S. Zhang and L. Wu and Ye, Y.}
}
