Bart Swennen

Object oriented software development with EROOS: The analysis phase - reference manual version 1.1

Stefan Van Baelen, Johan Lewi, Eric Steegmans, 1996 .

Learning to survive

Luc De Raedt, Maurice Bruynooghe, Bart Swennen, 1993 .

Constraints in Object-Oriented Analysis

Stefan Van Baelen, Johan Lewi, Eric Steegmans, 1993, ISOTAS.