Dominique Laurent Viet Phan Luong Nicolas Spyratos The Use of Deleted Tuples in Database, Querying and Updating. 905-925 1997 34 Acta Inf. 12 db/journals/acta/acta34.html#LaurentLS97 http://link.springer.de/link/service/journals/00236/bibs/7034012/70340905.htm