Giuseppe Berio Antonio Di Leva The M<sup>*</sup>-COMPLEX Approach to Enterprise Modeling, Engineering, and Integration. 7-18 http://link.springer.de/link/service/series/0558/bibs/1921/19210007.htm 2000 conf/er/2000w ER (Workshops) db/conf/er/erw2000.html#BerioL00