x Validation, verification, and test of knowledge-based systems / by Marc Ayel and Jean-Pierre Laurent. - Chichester ; New York : Wiley, c1991. - xx, 219 p. : ill. ; 25 cm. - Wiley professional computing . Includes bibliographical references. ISBN: 0471930180 Source: B-15546 Subjects--Topical Terms: Expert systems (Computer science) LC Class. No.: QA76.76.E95 / V47 1991