�Astr�om, Karl J. Computer-controlled systems : theory and design / Karl J. �Astr�om, Bj�orn Wittenmark. - 3rd ed. - Upper Saddle River, NJ : Prentice Hall, 1997. - xiv, 557 p. : ill. ; 24 cm. Includes index. Includes bibliographical references. ISBN: 0133148998 (hbk.) Subjects--Topical Terms: Automatic control--Data processing.