@article{Demšar2013,
author = {Demšar, U. and Harris, P. and Brunsdon, C. and Fotheringham, A.S. and McLoone, S.},
title= {Principal component analysis on spatial data: An overview},
year = {2013},
doi = {10.1080/00045608.2012.689236},
journal = {Annals of the Association of American Geographers},
volume = {103},
number = {1},
pages = {106--128},
}