Visser, Ingmar, and Maarten Speekenbrink. “depmixS4: An R Package for Hidden Markov Models”.
Journal of Statistical Software
36, no. 7 (August 5, 2010): 1–21. Accessed March 30, 2025. https://www.jstatsoft.org/index.php/jss/article/view/v036i07.