TY - BOOK ID - 138573331 TI - Fourth European symposium on the validation and verification of knowledge based systems : EUROVAV-97 : proceedings AU - Vanthienen, Jan AU - van Harmelen, Frank PY - 1997 PB - Leuven KUL. Institute for research in information systems DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:138573331 AB - ER -