@unpublished{Zhu2014,
annote = {US Patent 8,718,378},
author = {Li, Z and Xin, X and Katsaggelos, AK},
booktitle = {US Patent 8,718,378},
title = {{Image topological coding for visual search}},
url = {https://www.google.com/patents/US8718378},
year = {2014}
}

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