@article{PS_2009__13__328_0,
     author = {Karaliopoulou, Margarita},
     title = {On the number of word occurrences in a {semi-Markov} sequence of letters},
     journal = {ESAIM: Probability and Statistics},
     pages = {328--342},
     publisher = {EDP-Sciences},
     volume = {13},
     year = {2009},
     doi = {10.1051/ps:2008009},
     mrnumber = {2528087},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ps:2008009/}
}