@misc{indiciaed43049049e46,
  title = {Folkerts and Nijkamp reply.},
  author = {G Folkerts and F Nijkamp},
  year = {1999},
  doi = {10.1016/s0165-6147(99)01316-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/10203857/},
  note = {Source identifier: 10203857}
}