Some remarks on plane curves over fields of finite characteristic
Compositio Mathematica, Volume 60 (1986) no. 1, p. 3-17 
@article{CM_1986__60_1_3_0,
     author = {Pardini, Rita},
     title = {Some remarks on plane curves over fields of finite characteristic},
     journal = {Compositio Mathematica},
     publisher = {Martinus Nijhoff Publishers},
     volume = {60},
     number = {1},
     year = {1986},
     pages = {3-17},
     zbl = {0607.14023},
     mrnumber = {867952},
     language = {en},
     url = {http://www.numdam.org/item/CM_1986__60_1_3_0}
}

Pardini, Rita. Some remarks on plane curves over fields of finite characteristic. Compositio Mathematica, Volume 60 (1986) no. 1, pp. 3-17. http://www.numdam.org/item/CM_1986__60_1_3_0/

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