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@ARTICLE{,
author = {Fernández-Madrigal, Juan-Antonio and Gonzalez-Jimenez, Javier},
title = {Multihierarchical Graph Search},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
volume = {24},
number = {1},
year = {2002},
doi = {10.1109/34.982887},
pages = {103--113}
}