@article{Liu_2016, title={Functional principal component analysis of spatially correlated data}, volume={27}, ISSN={1573-1375}, url={http://dx.doi.org/10.1007/s11222-016-9708-4}, DOI={10.1007/s11222-016-9708-4}, number={6}, journal={Statistics and Computing}, publisher={Springer Science and Business Media LLC}, author={Liu, Chong and Ray, Surajit and Hooker, Giles}, year={2016}, month=Oct, pages={1639–1654} }