@post{fedispam,
  author = {Serge Wroclawski},
  year = {2019},
  title = {Preventing spam on the {F}ediverse},
  URL = {https://github.com/emacsen/rwot9-prague/blob/ap-unwanted-messages/topics-and-advance-readings/ap-unwanted-messages.md#postage},
}

@post{hashcash,
  author = {Adam Back},
  title = {Hashcash - A Denial of Service Counter-Measure},
  year = {2002},
}
                  
@post{djbim2000,
  author = {Daniel J. Bernstein},
  title = {Internet Mail 2000},
  year = {2000},
  url = {https://cr.yp.to/im2000.html},
}

@post{siebenmann2020,
  author = {Chris Siebenmann},
  title = {Daniel J. Bernstein's IM2000 email proposal is not a good idea},
  year = {2020},
  url = {https://utcc.utoronto.ca/~cks/space/blog/tech/IM2000NotGoodIdea},
}
                  
@post{godinstamps,
  author = {Seth Godin},
  title = {Paying for stamps},
  year = {2020},
  url = {https://overcast.fm/+L0YXXVXfY},
}