R.P. Cook and T.J. LeBlanc "A Symbol Table Abstraction to Implement Languages with Explicit Scope Control" from IEEE Transactions on Software Engineering, January 1983

Languages mentioned

• *MOD {1980} Concurrent MOdula
• Ada {1979} US DoD general purpose language
• Euclid {1977} Verifiable system software language
• Mesa {1977} XPARC Algol dialect
• SIMULA {1962} SIMUlation LAnguage