@book{matthews_2000, title={AutoCAD 2000 3D f/x and design}, ISBN={1576104060}, publisher={Scottsdale, AZ: Coriolis Group Books}, author={Matthews, B.}, year={2000} }
 @book{matthews_2000, title={Diseano 3d con Autocad 2000}, publisher={Madrid: Anaya Multimedia}, author={Matthews, B.}, year={2000} }