Le Lann, Gérard. An Analysis of the Ariane 5 Flight 501 Failure – A System Engineering Perspective. Proceedings of the 1997 international conference on Engineering of computer-based systems (ECBS'97). IEEE Computer Society: 339–346. March 1997. ISBN 0-8186-7889-5. doi:10.1109/ECBS.1997.581900.