Ruonan Li Li, R., & Xiao, L. (2023, September 4). Latent factor model for multivariate functional data. BIOMETRICS, Vol. 9. https://doi.org/10.1111/biom.13924 Cui, E., Li, R., Crainiceanu, C. M., & Xiao, L. (2022, October 7). Fast Multilevel Functional Principal Component Analysis. JOURNAL OF COMPUTATIONAL AND GRAPHICAL STATISTICS, Vol. 10. https://doi.org/10.1080/10618600.2022.2115500 Li, R., Xiao, L., Smirnova, E., Cui, E., Leroux, A., & Crainiceanu, C. M. (2022, May 1). Fixed-effects inference and tests of correlation for longitudinal functional data. STATISTICS IN MEDICINE, Vol. 5. https://doi.org/10.1002/sim.9421