TY - JOUR AU - Halava, Vesa AU - Harju, Tero AU - Kärki, Tomi TI - The theorem of Fine and Wilf for relational periods JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications PY - 2009 DA - 2009/// SP - 209 EP - 220 VL - 43 IS - 2 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ita:2008025/ UR - https://zbmath.org/?q=an%3A1166.68035 UR - https://www.ams.org/mathscinet-getitem?mr=2512255 UR - https://doi.org/10.1051/ita:2008025 DO - 10.1051/ita:2008025 LA - en ID - ITA_2009__43_2_209_0 ER -