@article{AndreiKudlekNiculescu2000,
  author    = {{Stefan Andrei and Manfred Kudlek and Radu Stefan Niculescu}},
  title     = {{Some results on the Collatz problem}},
  journal   = {{Acta Informatica}},
  year      = {{2000}},
  volume    = {{37}},
  pages     = {{145--160}},
  url       = {{https://www.researchgate.net/publication/220198003_Some_results_on_the_Collatz_problem}},
  note      = {{MR 2002c:11022}},
}