A few remarks are given on the relations between syntax and semantics in the programming languages.  The aim is to point out that, it is true that the grammar of a contex-free language should be conceived not only as a strings-generating device but also as a method for expressing a meaning, then the grammar of ALGOL is open to some criticism.
['Luigi Petrone', 'Carlo E. Vandoni']
Integer and signed constants in ALGOL