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ŠPROJCAR, Josef. The Primitive beyond Voting Schemes. In MEMICS 2006, 2nd Doctoral Workshop on Mathematical and Engineering Methods in Computer Science. Brno: Faculty of Information Technology, Brno University of Technology, 2006, s. 230-236. ISBN 80-214-3287-X.Podrobněji: https://is.muni.cz/publication/704408/cs