Hagedom, R.; J. Reinfelds, C. Vandoni, and L van Hove "SIGMA, A New Language for Interactive Array-Oriented Computing" European Organization for Nuclear Research, Geneva (Switzerland). 21 Dec 78 CERN-78-12

Languages mentioned

• SIGMA {1972} Interactive maths system based on CFS
• SIGMA 76 {1976} Improved version of SIGMA