TY - JOUR AU - I. V. Dolgachev TI - On Elements of Order $p^s$ in the Plane Cremona Group over a Field of Characteristic $p$ JO - Informatics and Automation PY - 2009 SP - 55 EP - 62 VL - 264 UR - http://geodesic.mathdoc.fr/item/TRSPY_2009_264_a5/ LA - en ID - TRSPY_2009_264_a5 ER -