- Handbook of Ambient Intelligence and Smart Environments, (2010)
- Milin, Lohmar, 2. edition, (2009)
- Handbook of Ambient Intelligence and Smart Environments, (2010)
- Sagehill, Santa Cruz, CA, 4. edition, (2007)
- Springer, Berlin, (1997)
- Pearson Studium, München, 2. edition, (2005)
- Galileo Press, Bonn, (2005)
- Graphics Press, Cheshire, CT, 2. edition, (2006)
- Addison-Wesley, Upper Saddle River, NJ, 2. edition, (2007)
- Addison-Wesley, München, (2000)
- Multimedia Tools and Applications 43(3):253-274 (2009)
- Springer, Berlin, (2009)
- O'Reilly, Sebastopol, CA, (1999)


user