The kernel of a generic software development environment. - Axel van Lamsweerde; M. Buyse; Bruno Delcourt; Emmanuelle Delor; M. Ervier; Marie-Claire Schayes (SDE, 1986)

Generic Lifecycle Support in the ALMA Environment. - Axel van Lamsweerde; Bruno Delcourt; Emmanuelle Delor; Marie-Claire Schayes; Robert Champagne (IEEE Trans. Software Eng., 1988)

GRAIL/KAOS: An Environment for Goal-Driven Requirements Engineering. - Robert Darimont; Emmanuelle Delor; Philippe Massonet; Axel van Lamsweerde (ICSE, 1997)

GRAIL/KAOS: An Environment for Goal-Driven Requirements Analysis, Integration and Layout. - Robert Darimont; Emmanuelle Delor; Philippe Massonet; Axel van Lamsweerde (RE, 1997)

Requirements Engineering with Grail/Kaos: Tell the Requirements, All the Requirements, and Nothing Else but the Requirement. - Robert Darimont; Emmanuelle Delor; Jean-Luc Roussel; André Rifaut (RE, 2002)