Brave, Scott A., R. Andrew Butters, and David Kelley. “A Practitioner’s Guide and MATLAB Toolbox for Mixed Frequency State Space Models”. Journal of Statistical Software 104, no. 10 (October 31, 2022): 1–40. Accessed December 22, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v104i10.