"Elektrotechniek." . . . . . . . "SAP IV : a Structural Analysis Program for static and dynamic response of linear systems" . . . . . . . . . . "SAP IV : a structural analysis program for static and dynamic response of linear systems"@en . "SAP IV : a structural analysis program for static and dynamic response of linear systems" . . . . . . . . . . . "SAP IV, a structural analysis program for static and dynamic response of linear systems"@en . . "SAP four*A structural analysis program for static and dynamic response of linear systems : a report to the Nat. Science Foundation" . . . . . . . . "SAP four*structural analysis program for static and dynamic response of linear systems" . . "Structural analysis program for static and dynamic response of linear systems"@en . . . . "SAP IV : a structural analysis program for static and dinamic response of linear systems" . . . "SAP IV (Computer program)" . . "Software." . .