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(2009). Conceptual modeling - ER 2009: 28th International Conference on Conceptual Modeling, Gramado, Brazil, November 9-12, 2009, Proceedings.

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Conceptual Modeling - ER 2009: 28th International Conference On Conceptual Modeling, Gramado, Brazil, November 9-12, 2009, Proceedings. 2009.

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Conceptual Modeling - ER 2009: 28th International Conference On Conceptual Modeling, Gramado, Brazil, November 9-12, 2009, Proceedings. 2009.