1. Aristides Kontogeorgis and Yifan Yang, Automorphisms of hyperelliptic modular curves X0(N) in positive characteristic, LMS J. Comput. Math. 13 (2010), 144–163.[MR/arXiv]
  2. Aristides Kontogeorgis and Yifan Yang, Automorphisms of hyperelliptic modular curves X0(N) in positive characteristic, LMS J. Comput. Math. 13 (2010), 144-163.