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\bibitem{1831} Miquel Ferrer, Dimosthenis Karatzas, Ernest Valveny, I. Bardaji, \& Horst Bunke. (2011). A Generic Framework for Median Graph Computation based on a Recursive Embedding Approach. \textit{CVIU - Computer Vision and Image Understanding}, \textit{115}(7), 919--928.

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