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2. Bauer, F.L., M. Broy, W. Dosch, R. Gnatz, B. Krieg- Brueckner, A. Laut, M. Luckmann, T. A. Matzner, B. Moeller, H. Partsch, P. Pepper, K. Samelson, R. Steinbrueggen, M. Wirsing, H. Woessner, “Programming in a Wide Spectrum Language: a Collection of Examples,” Science of Computer Programming Vol. 1, 1981, pp. 73–114.
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4. Department of Defense,Revised Steelman Requirements for High Order Computer Programming Languages, 1979.
5. Habermann, A.N., “Critical Comments on the Programming Language Pascal,”Acta Informatica, Vol. 3, 1973, pp. 47–57.