Amira Rahal Qiang Zhu Per-Åke Larson Developing Evolutionary Cost Models for Query Optimization in a Dynamic Multidatabase Environment. 1-18 2002 conf/coopis/2002 CoopIS/DOA/ODBASE http://link.springer.de/link/service/series/0558/bibs/2519/25190001.htm db/conf/coopis/coopis2002.html#RahalZL02