‘Stockhausen has told me how he made precise working drawings of his electronic compositions, even the most complicated of them. To a great extent these took the form of an attempt to describe precisely what had been done. Such documents are progress reports for the presen and for the future, preponderantly destined for the attention of composers. Thus the score is something more than a mere aid to realization; it is a textbook for composers’.
Karl. H. Worner, Stockhausen: Life and Work (1973)