Agile Modeling (http://www.agilemodeling.com/)
OMG (http://www.omg.com/)
OMG/UML (http://www.uml.org/)
StarUML (http://www.staruml.com/)
A Pattern for Structuring UML Repositories
Use Case Diagramming Guidelines
The Three R’s of Use Case Formalisms: Realization, Refinement,
and Reification
See the articles on System and Systems Theory in the Wikipedia for a nice overview of General Systems Theory.
Lecture notes for all of my classes appear at www.cs.sjsu.edu/faculty/pearce
Of particular interest are my lectures on Object-Oriented Analysis and Object-Oriented Design.
The lecture notes for this course are at www.cs.sjsu.edu/faculty/pearce/uml