·          Software Engineering Practices , A practitioner’s Approach – Roger S Pressman
·          UML 2 Sequence Diagrams from
http://www.agilemodeling.com/artifacts/sequenceDiagram.htm
·          System Requirements from official Microsoft MSDN Specs.
http://msdn2.microsoft.com/en-us/library/ms229070(VS.80).aspx
·          Unified Modeling Language references:

http://en.wikipedia.org/wiki/Unified_Modeling_Language