By Koprinkova-Hristova P.   Patarinska T.   in International Journal of Systems Science

ISSN:1464-5319|37|5|271-277

Taylor & Francis Ltd‎(2006)‎

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By Koprinkova P.   Petrova M.   Patarinska T.   Bliznakova M.   in Cybernetics and Systems

ISSN:1087-6553|29|3|303-317

Taylor & Francis Ltd‎(1998)‎

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