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\bibitem{2293} Hongxing Gao, Mar{\c c}al Rusi{\~n}ol, Dimosthenis Karatzas, Josep Llados, Tomokazu Sato, Masakazu Iwamura, et al. (2013). Key-region detection for document images -applications to administrative document retrieval. In \textit{12th International Conference on Document Analysis and Recognition} (pp. 230--234).

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