1. Lecture Notes in Computer Science;C.S. Jensen,1998
2. de Castro, C., Grandi, F., Scalas, M.R.: Schema versioning for multitemporal relational databases. Information Systems 22(5), 249–290 (1997)
3. Moreira, V.P., Edelweiss, N.: Schema versioning: Queries to the generalized temporal database system. In: Spatio-Temporal Data Models and Languages, in con-juntion with Int’l. Conf. on Database and Expert Systems Applications, pp. 458–459. IEEE Computer Society, Florence (1999)
4. Roddick, J.F., Grandi, F., Mandreoli, F., Scalas, M.R.: Beyond schema versioning: A flexible model for spatio-temporal schema selection. Geolnformatica 5(1), 33–50 (2001)
5. Grandi, F., Mandreoli, F.: A formal model for temporal schema versioning in object-oriented databases, Tech. Rep. TR-68, Time Center (January 2002)