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Atualizado em 13/05/2026 · De todos da iMusic
![Cover for Andranik Tangian · Analytical Theory of Democracy: History, Mathematics and Applications - Studies in Choice and Welfare (Paperback Book) [2020 edition] (2021)](https://imusic.b-cdn.net/images/item/original/923/9783030396923.jpg?andranik-tangian-2021-analytical-theory-of-democracy-history-mathematics-and-applications-studies-in-choice-and-welfare-paperback-book&class=scaled&v=1616326957)
![Cover for Andranik Tangian · Mathematical Theory of Democracy - Studies in Choice and Welfare (Paperback Book) [Softcover reprint of the original 1st ed. 2014 edition] (2015)](https://imusic.b-cdn.net/images/item/original/808/9783642434808.jpg?andranik-tangian-2015-mathematical-theory-of-democracy-studies-in-choice-and-welfare-paperback-book&class=scaled&v=1614708599)
![Cover for Andranik Tangian · Mathematical Theory of Democracy - Studies in Choice and Welfare (Hardcover Book) [2014 edition] (2013)](https://imusic.b-cdn.net/images/item/original/234/9783642387234.jpg?andranik-tangian-2013-mathematical-theory-of-democracy-studies-in-choice-and-welfare-hardcover-book&class=scaled&v=1413927960)
![Cover for Andranik Tangian · Constructing Scalar-Valued Objective Functions: Proceedings of the Third International Conference on Econometric Decision Models: Constructing Scalar-Valued Objective Functions University of Hagen Held in Katholische Akademie Schwerte September 5-8, 1995 (Paperback Book) [Softcover reprint of the original 1st ed. 1997 edition] (1997)](https://imusic.b-cdn.net/images/item/original/616/9783540630616.jpg?andranik-tangian-1997-constructing-scalar-valued-objective-functions-proceedings-of-the-third-international-conference-on-econometric-decision-models-constructing-scalar-valued-objective-functions-university-of-hagen-held-in-katholische-akademie-schwerte-s&class=scaled&v=1604036454)