1. Akcamete A. Akinci B. Garrett J. H. Jr. (2008) "Towards a formal approach for
2. updating building information models." Proc. 5th International Conference on
3. Innovation in Architecture Engineering and Construction 2008 Antalya Turkey.
4. Banerjee J. Kim W. Kim H. and Korth H. (1987) "Semantics and implementation
5. of schema evolution in object-oriented databases." Proc. 1987 ACM SIGMOD