@book{1993-hanna ,note={URL: {\tt ftp://gatekeeper.research.compaq.com/pub/DEC/SRC/research-reports/SRC-107.pdf}. Note: Technical Report 107} ,title={{The Vesta language for configuration management}} ,booktitle={{The Vesta language for configuration management}} ,author={Chris B. Hanna and Roy Levin} ,publisher={DEC Systems Research Center} ,address={Palo Alto, California} ,year={1993} }