Cao, J., M. G. Genton, D. E. Keyes, and G. M. Turkiyyah. “Tlrmvnmvt: Computing High-Dimensional Multivariate Normal and Student-T Probabilities With Low-Rank Methods in R”. Journal of Statistical Software, vol. 101, no. 4, Jan. 2022, pp. 1-25, doi:10.18637/jss.v101.i04.