@article{Substitutions_Lambda_Free-AFP,
  author = {Vincent Trélat},
  title = {Substitutions for Lambda-Free Higher-Order Terms},
  journal = {Archive of Formal Proofs},
  month = apr,
  year = {2024},
  note = {\url{https://isa-afp.org/entries/Substitutions_Lambda_Free.html}, Formal proof development},
  issn = {2150-914x},
}