Betty Salzberg Linan Jiang David B. Lomet Manuel Barrena García Jing Shan Evangelos Kanoulas A Framework for Access Methods for Versioned Data. 730-747 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2992&spage=730 2004 conf/edbt/2004 EDBT db/conf/edbt/edbt2004.html#SalzbergJLGSK04