海量图书期刊资源，随时随地畅享阅读乐趣
Customization of system software for large-scale embedded applicationsJ. Nehmer; P. Sturm; M. Baentsch; L. Baum; G. Molter; S. Rothkugel · 1997
From paper-and-pen annotations to artefact-based mobile learningC. Hoff; U. Wehling; S. Rothkugel · 2009