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Bair J., Böhlen M.H., Jensen C.S., and Snodgrass R.T. Notions of upward compatibility of temporal query languages. Wirtschaftsinformatik, 39(1):25–34, February 1997.
Clifford J., Dyreson C., Isakowitz T., Jensen C.S., and Snodgrass R.T. On the Semantics of “NOW” in Databases. ACM Trans. Database Syst., 22:171–214, June 1997.
Snodgrass R.T. Developing Time-Oriented Database Applications in SQL. Morgan Kaufmann, Los Altos, CA, 1999.
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Böhlen, M.H., Jensen, C.S., Snodgrass, R.T. (2009). Current Semantics. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_1068
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DOI: https://doi.org/10.1007/978-0-387-39940-9_1068
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