Siena is the result of work by:

	Antonio Carzaniga <carzanig@cs.colorado.edu>
	David S. Rosenblum <dsr@ics.uci.edu>
	Alexander L. Wolf <alw@cs.colorado.edu>

This work was supported in part by the Air Force Materiel Command,
Rome Laboratory, and the Defense Advanced Research Projects Agency
under Contract Numbers F30602-94-C-0253 and F30602-98-2-0163,
principal investigators Dennis Heimbigner and Alexander L. Wolf.  The
content of the information does not necessarily reflect the position
or the policy of the Government and no official endorsement should be
inferred.

We thank Dennis Heimbigner, Richard S. Hall, and Andre' van der Hoek
of the Software Engineering Research Laboratory, University of
Colorado at Boulder, and Giampaolo Cugola, Elisabetta Di Nitto, and
Alfonso Fuggetta of Politecnico di Milano for their contributions to
this work.
