@article{TRSPY_2009_264_a5,
     author = {I. V. Dolgachev},
     title = {On {Elements} of {Order} $p^s$ in the {Plane} {Cremona} {Group} over {a~Field} of {Characteristic~}$p$},
     journal = {Informatics and Automation},
     pages = {55--62},
     publisher = {mathdoc},
     volume = {264},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2009_264_a5/}
}