G. Boente, D. Rodriguez, and M. Sued, Inference under functional proportional and common principal component models, Journal of Multivariate Analysis, vol.101, issue.2, pp.464-475, 2010.
DOI : 10.1016/j.jmva.2009.09.009
URL : http://doi.org/10.1016/j.jmva.2009.09.009

J. Dauxois, A. Pousse, and Y. Romain, Asymptotic theory for the principal component analysis of a vector random function: Some applications to statistical inference, Journal of Multivariate Analysis, vol.12, issue.1, pp.136-154, 1982.
DOI : 10.1016/0047-259X(82)90088-4

B. K. Flury, Common Principal Components in K Groups, Journal of the American Statistical Association, vol.79, issue.388, pp.892-900, 1984.
DOI : 10.2307/2288721