1. Ayre, C., Muir, A.: Right to Preserve? Copyright and licensing for digital preservation project Final Report, Department of Information Science, Loughborough University (2004) (accessed 8-3-07),
http://www.lboro.ac.uk/departments/ls/disresearch/CLDP/DOCUMENTS/Finalreport.doc
2. Lecture Notes in Computer Science;A. Koulouris,2005