@misc{sto-18-enquk,
  author = {Jorge Stolfi},
  title = {Written evidence for inquiry on Digital Currencies}, 
  howpublished = {Letter sent to the UK Parliament},
  url = {http://data.parliament.uk/writtenevidence/committeeevidence.svc/evidencedocument/treasury-committee/digital-currencies/written/82215.pdf},
  year = 2018
}