@article{MR2638986,
  abstract = {We study the automorphism groups of the reduction X0(N)×𝔽ˉp of a modular curve X0(N) over primes p $\nmidd N$. },
  file = {KontogeorgisYifanAugust09.pdf},
  mrclass = {11G18 (11G20 14H37)},
  mrnumber = {2638986 (2012a:11079)},
  issn = {1461-1570},
  year = {2010},
  url = {http://dx.doi.org/10.1112/S1461157009000023},
  author = {Kontogeorgis, Aristides and Yang, Yifan},
  mrreviewer = {Jordi Gu{\`a}rdia},
  pages = {144--163},
  volume = {13},
  fjournal = {LMS Journal of Computation and Mathematics},
  doi = {10.1112/S1461157009000023},
  journal = {LMS J. Comput. Math.},
  title = {Automorphisms of hyperelliptic modular curves {$X_0(N)$} in positive characteristic}
}