Cai Li Li, C., Xiao, L., & Luo, S. (2022). Joint model for survival and multivariate sparse functional data with application to a study of Alzheimer's Disease. BIOMETRICS, 78(2), 435–447. https://doi.org/10.1111/biom.13427 Feng, Y., Xiao, L., Li, C., Chen, S. T., & Ohuma, E. O. (2020). Correlation models for monitoring fetal growth. STATISTICAL METHODS IN MEDICAL RESEARCH, 29(10), 2795–2813. https://doi.org/10.1177/0962280220905623 Li, C., Xiao, L., & Luo, S. (2020). Fast covariance estimation for multivariate sparse functional data. STAT, 9(1). https://doi.org/10.1002/sta4.245 Park, S. Y., Li, C., Benavides, S. M. M., Heugten, E., & Staicu, A. M. (2019). Conditional Analysis for Mixed Covariates, with Application to Feed Intake of Lactating Sows. JOURNAL OF PROBABILITY AND STATISTICS, 2019. https://doi.org/10.1155/2019/3743762 Xiao, L., Li, C., Checkley, W., & Crainiceanu, C. (2018). Fast covariance estimation for sparse functional data. STATISTICS AND COMPUTING, 28(3), 511–522. https://doi.org/10.1007/s11222-017-9744-8 Xiao, L., Li, C., Checkley, W., & Crainiceanu, C. (2018, May). Fast covariance estimation for sparse functional data (vol 28, pg 511, 2017). STATISTICS AND COMPUTING, Vol. 28, pp. 523–523. https://doi.org/10.1007/s11222-017-9768-0 Li, C., & Zhou, H. (2017). svt: Singular value thresholding in MATLAB. Journal of Statistical Software, 81(CN2).