References              　

  Representing Time in Multimedia Systems

           Thomas Wahl, Kurt Rothermel , Universitat Stuttgart ,

     Institut für Parallele und Verteilte Hochstleistungrechner

          Proc. IEEE Conference on Multimedia, Boston, 1994.

  Time Representation and Management in MADEUS: an

    authoring environment for multimedia documents

    M. Jourdan, N. Laya¨yda, and L. Sabry-Ismail.

     In M. Freeman, P. Jardetzki, and H.M. Vin, editors,

     Multimedia Computing and Networking 1997

    Representing Time in  Multimedia Systems.

        Thomas Wahl and Kurt Rothermel

          Technical Report 12, Universitaet Stuttgart, 10 1993.

   Automatic Temporal Layout Mechanisms.

        M. Cecilia Buchanan and Polle T. Zellweger.        

          In 1st ACM Intl. Conference on Multimedia, pages 341 – 350, 8 1993.