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• Bulyonkov, Mikhail A.; Rar, Alexandre F. and Terek (1993) Bulyonkov, Mikhail A.; Rar, Alexandre F. and Terekhov, Andrey N. "Algol 68 - 25 years in USSR"
• Meertens, L. (1993) Meertens, L. "The design of elegant languages" pp53-64