https://www.jstatsoft.org/article/view/v031i10 https://hhmi.enterprise.slack.com/files/WAQ8XCAES/F09HS9V9UHG/readme.txt?origin_team=E7T75T6FR&origin_channel=D019RGPCYFN https://hhmi.enterprise.slack.com/files/WAQ8XCAES/F09HWSDCCCU/readme.md?origin_team=E7T75T6FR&origin_channel=D019RGPCYFN
