@article{ZNSL_2009_363_a5,
     author = {S. Trevezas and N. Limnios},
     title = {Maximum likelihood estimation for general hidden {semi-Markov} processes with backward recurrence time dependence},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {105--125},
     publisher = {mathdoc},
     volume = {363},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_363_a5/}
}