Doherty, P. (1991). NML3: A non-monotonic formalism with explicit defaults. Linköping University, Dept. of Computer and Information Science.
Chicago-referens (17:e uppl.)Doherty, Patrick. NML3: A Non-monotonic Formalism with Explicit Defaults. Linköping, Sweden: Linköping University, Dept. of Computer and Information Science, 1991.
MLA-referens (8:e uppl.)Doherty, Patrick. NML3: A Non-monotonic Formalism with Explicit Defaults. Linköping University, Dept. of Computer and Information Science, 1991.
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