@conference {DBLP:conf/dawak/SimitsisVTS05,
	title = {Graph-Based Modeling of ETL Activities with Multi-level Transformations and Updates},
	booktitle = {Data Warehousing and Knowledge Discovery, 7th International Conference, DaWaK 2005, Copenhagen, Denmark, August 22-26, 2005, Proceedings},
	year = {2005},
	pages = {43{\textendash}52},
	doi = {10.1007/11546849_5},
	url = {https://doi.org/10.1007/11546849_5},
	author = {Alkis Simitsis and Panos Vassiliadis and Manolis Terrovitis and Spiros Skiadopoulos}
}
