An evaluation
Tamm, Boris, inform.
Computer Languages for Numerical Control : proceedings of the Second IFIP/IFAC International Conference on Programming Languages for Machine Tools, PROLAMAT '73, Budapest, April 10-13, 1973
1973
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p. 753-755
https://books.google.ee/books/about/Budapest_1973_Computer_Languages_for_Num.html?id=a_sAMwEACAAJ&redir_esc=y