Will, H.J. "Design of a generalized audit command language (ACL)" pp122-142

Beckmann, M.; Goos, G. (1973) Beckmann, M.; Goos, G. and H.P. Kuenzi (Eds) Lecture Notes on Economies and Mathematical Systems. Springer-Verlag, Berlin 1973  

Languages mentioned ACL {1972} Audit Command Language