Extending UML to Represent Interaction Roles and Variants of Design Pattern. - Keen Ngee Loo; Sai Peck Lee (ICSOFT (2), 2010)

UML Extension for Defining the Interaction Variants of Design Patterns. - Keen Ngee Loo; Sai Peck Lee; Thiam Kian Chiew (IEEE Softw., 2012)