@article {3866,
	title = {Query Optimization in XML Structured-Document Databases},
	journal = {The VLDB Journal},
	volume = {15},
	year = {2006},
	pages = {263--289},
	doi = {10.1007/s00778-005-0172-6},
	author = {Dunren Che and Karl Aberer and Tamer Ozsu}
}
