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\bibitem{2896} Mar{\c c}al Rusi{\~n}ol, \& Josep Llados. (2017). Flowchart Recognition in Patent Information Retrieval. In M. Lupu, K. Mayer, N. Kando, \& A.J. Trippe (Eds.), \textit{Current Challenges in Patent Information Retrieval} (Vol. 37, pp. 351--368). Springer Berlin Heidelberg.

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