Reference:
Geometric clustering: Fixed-parameter tractability and lower bounds with respect to the dimension (Sergio Cabello, Panos Giannopoulos, Christian Knauer, Dániel Marx, Günter Rote), In ACM Transactions on Algorithms, volume 7, 2011.
Bibtex Entry:
@article{journals/talg/CabelloGKMR11,
author = {Sergio Cabello and
Panos Giannopoulos and
Christian Knauer and
D{\'a}niel Marx and
G{\"u}nter Rote},
title = {Geometric clustering: Fixed-parameter tractability and lower
bounds with respect to the dimension},
journal = {ACM Transactions on Algorithms},
volume = {7},
number = {4},
year = {2011},
pages = {43},
doi = {10.1145/2000807.2000811}
}