1. EUROCAE ED12B – Software considerations in Airborne Systems and Equipment Certification, .
2. The B-Book: Assigning Programs to Meanings;Abrial,1996
3. J.-R. Abrial, Formal Method Course. Part I: Introduction, 2005, .
4. J.-R. Abrial, ClearSy, , 1998. Atelier-B.
5. Dear sir, Yours faithfully: an everyday story of formality;Amey,2004