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The tiers of Disaster Recovery and TSM. Charlotte Brooks, Matthew Bedernjak, Igor Juran, and John Merryman. In, Disaster Recovery Strategies with Tivoli Storage Management. Chapter 2. Pages 21–36. Red Books Series. IBM. Tivoli Software. 2002.

SteelStore Cloud Storage Gateway: Disaster Recovery Best Practices Guide. Riverbed Technology, Inc. October 2011.

Disaster Recovery Levels. Robert Kern and Victor Peltz. IBM Systems Magazine. November 2003.

Business Continuity: The 7-tiers of Disaster Recovery. Recovery Specialties. 2007.

Continuous Operations: The Seven Tiers of Disaster Recovery. Mary Hall. The Storage Community (IBM). 18 July 2011. Retrieved 26 March 2013.

Maximum Tolerable Period of Disruption (MTPOD)

Maximum Tolerable Period of Disruption (MTPOD): BSI committee response