Clements, P., Bachmann, F., Bass, L., Garlan, D., Ivers, J., Little, R., Nord, R. and Stafford, J., (2003). Documenting Software architectures – Views and Beyond. Addison Wesley, Boston, MA.
The "4+1" view model of software architecture, Philippe Kruchten, November 1995, http://www3.software.ibm.com/ibmdl/pub/software/rational/web/whitepapers/2003/Pbk4p1.pdf
Object Management Group UML 2.0 Specification - http://www.omg.org/technology/documents/formal/uml.htm
i2b2 (Informatics for Integrating Biology and the Bedside) https://www.i2b2.org/resrcs/hive.html