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A critical review of proprietary software protection
Franz, Charles R., (1981)
Po vĒprosa za patentovaneto na programnite produkti
Todorov, Ivan, (1982)
Structured programming in MACRO-11 : [a self-instruction workbook for MAKRO-11 programming of the LSI-11 and PDP-11 family of computers]
Southern, Bob, (1982)