@article{frengley:congs-of-ell-crv-nonsurj-reps,
  title         = {Congruences of elliptic curves arising from nonsurjective mod {$N$} {G}alois representations},
  author        = {{Frengley}, Sam},
  year          = 2023,
  journal       = {Math. Comp.},
  volume        = 92,
  number        = 339,
  pages         = {409--450},
  doi           = {10.1090/mcom/3770},
  issn          = {0025-5718},
  url           = {https://doi.org/10.1090/mcom/3770},
  fjournal      = {Mathematics of Computation},
  mrclass       = {11G05},
  mrnumber      = 4496970
}