UML sequence diagrams overview of graphical notation - lifeline, message, execution specification, interaction use, etc.
Sequence diagram of answering asynchronous server requests. | Download Scientific Diagram
Sequence Diagrams CSIS3600. Sequence Diagrams A sequence diagram shows an interaction arranged in time sequence. In particular, it shows the objects participating. - ppt download
Message sequence diagram of a call-waiting scenario | Download Scientific Diagram
How to Use Duration Constraint in Sequence Diagram?