Which stochastic models allow Baum-Welch training?

Helmut Lucke. Which stochastic models allow Baum-Welch training?. IEEE Transactions on Signal Processing, 44(11):2746-2756, 1996. [doi]

@article{Lucke96,
  title = {Which stochastic models allow Baum-Welch training?},
  author = {Helmut Lucke},
  year = {1996},
  doi = {10.1109/78.542181},
  url = {http://dx.doi.org/10.1109/78.542181},
  researchr = {https://researchr.org/publication/Lucke96},
  cites = {0},
  citedby = {0},
  journal = {IEEE Transactions on Signal Processing},
  volume = {44},
  number = {11},
  pages = {2746-2756},
}