Dunning, A.J. (31 December 1977). "Origins, development and future of the Euronet". Program. 11 (4). Emeraldinsight.com: 145–155. doi:10.1108/eb046759.
Gilchrist, Ian (September 1999). "Attitudes to Ada—a market survey". SIGAda '99: Proceedings of the 1999 annual ACM SIGAda international conference on Ada. SIGAda. pp. 229–242. doi:10.1145/319294.332014.