@article{ITA_2009__43_1_165_0,
     author = {Currie, James D. and Saari, Kalle},
     title = {Least periods of factors of infinite words},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {165--178},
     publisher = {EDP-Sciences},
     volume = {43},
     number = {1},
     year = {2009},
     doi = {10.1051/ita:2008006},
     mrnumber = {2483449},
     zbl = {1162.68510},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2008006/}
}