@article {8972,
	title = {A characterization of elliptical distributions and some optimality properties of principal components for functional data},
	journal = {Journal of Multivariate Analysis},
	volume = {131},
	year = {2014},
	pages = {254 - 264},
	keywords = {Principal components},
	issn = {0047-259X},
	doi = {10.1016/j.jmva.2014.07.006},
	url = {http://www.sciencedirect.com/science/article/pii/S0047259X14001638},
	author = {Graciela Boente and Mat{\'\i}as Salibi{\'a}n Barrera and David E. Tyler}
}
