@article{lehericy2018sbs, author = {Luc Leh{\'e}ricy}, title = {State-by-state Minimax Adaptive Estimation for Nonparametric Hidden {M}arkov Models}, journal = {Journal of Machine Learning Research}, year = {2018}, volume = {19}, number = {39}, pages = {1-46}, url = {http://jmlr.org/papers/v19/17-345.html} }