@article{JMLR:v26:23-0343,
  author  = {Yang Chen and Cheng-Der Fuh and Chu-Lan Michael Kao},
  title   = {Determine the Number of States in Hidden Markov Models via Marginal Likelihood},
  journal = {Journal of Machine Learning Research},
  year    = {2025},
  volume  = {26},
  number  = {58},
  pages   = {1--59},
  url     = {http://jmlr.org/papers/v26/23-0343.html}
}