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\bibitem{2322} Lluis Pere de las Heras, Joan Mas, Gemma Sanchez, \& Ernest Valveny. (2013). Notation-invariant patch-based wall detector in architectural floor plans. In \textit{Graphics Recognition. New Trends and Challenges} (Vol. 7423, pp. 79--88). LNCS. Springer Berlin Heidelberg.

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