The ERAE Model: A Case Study. - Eric Dubois 001; Jacques Hagelstein; Eugene Lahou; Frank Ponsaert; André Rifaut; Fiona Williams (Information Systems Design Methodologies: Improving the Practice, 1986)

A knowledge representation language for requirements engineering. - Eric Dubois 001; Jacques Hagelstein; Eugene Lahou; Frank Ponsaert; André Rifaut (Proc. IEEE, 1986)

Introducing Formal Requirements into Industry. - Jacques Hagelstein; Frank Ponsaert (Algebraic Methods, 1989)