Zvi Drezner. Finding a cluster of points and the grey pattern quadratic assignment problem. OR Spectrum, 28(3):417-436, 2006. [doi]
@article{Drezner06,
title = {Finding a cluster of points and the grey pattern quadratic assignment problem},
author = {Zvi Drezner},
year = {2006},
doi = {10.1007/s00291-005-0010-7},
url = {https://doi.org/10.1007/s00291-005-0010-7},
researchr = {https://researchr.org/publication/Drezner06},
cites = {0},
citedby = {0},
journal = {OR Spectrum},
volume = {28},
number = {3},
pages = {417-436},
}