1. MunroeR.Flatland[image on the Internet].c2010[cited 2014 Nov 10]. Available from:https://xkcd.com/721/
2. WildingD.Four‐dimensional data navigation[master's thesis].Provo UT:Brigham Young University;2007.
3. IsaacsonPL.Computer graphic presentation of hypothesized four‐dimensional phenomena[master's thesis].Provo UT:Brigham Young University;1984.