@book{Lagarias2010,
  author    = {{Jeffrey C. Lagarias}},
  title     = {{The Ultimate Challenge: The $3x+1$ Problem}},
  publisher = {{American Mathematical Society}},
  year      = {{2010}},
  volume    = {{78}},
  pages     = {{344}},
  doi       = {{10.1090/mbk/078}},
  editor    = {{Jeffrey C. Lagarias}},
  series    = {{Mathematical Surveys and Monographs}},
  isbn      = {{978-0-8218-4940-8}},
}