1. Bechtold, S. Vom Urheber- zum Informationsrecht, Implikationen des Digital Rights Management. Verlag C.H. Beck oHG, München, 2002.
2. Hauser, T. and Wenz, C. DRM Unter Attack: Weaknesses in Existing Systems. In: Becker E. et al. (eds.), Digital Rights Management — Technological, Economic, Legal and Political Aspects. Springer, Berlin, 2003, pp. 342–362.
3. Guo, H. Digital Rights Management (DRM) Using XrML URL: http://www.tml.hut.fi/Studies/T-110.501/2001/papers/guo.heng.pdf , [accessed: 2005-07-01]. 2001.
4. Fränkl, G. and Karpf, P. Digital Rights Management Systeme — Einführung, Technologien, Recht, Ökonomie und Marktanalyse. Pg Verlag, München, 2004.
5. Owens, R. and Akalu, R. Legal Policy and Digital Rights Management. In: Kambhammettu S. (ed.), Digital Rights Management: Concepts and Applications. Le Magnus University Press, Hyderabad, 2005, pp. 64–85.