Oelschläger, Lennart, Timo Adam, and Rouven Michels. “FHMM: Hidden Markov Models for Financial Time Series in R”. Journal of Statistical Software 109, no. 9 (June 3, 2024): 1–25. Accessed May 16, 2025. https://www.jstatsoft.org/index.php/jss/article/view/v109i09.