https://en.m.wikipedia.org/wiki/MacTutor_History_of_Mathematics_archive#:~:text=The%20History%20of%20Mathematics%20archive%20was%20an%20outgrowth,the%20same%20year%2C%20they%20founded%20their%20web%20site.

https://en.m.wikipedia.org/wiki/MacTutor_History_of_Mathematics_archive#:~:text=The%20History%20of%20Mathematics%20archive%20was%20an%20outgrowth,the%20same%20year%2C%20they%20founded%20their%20web%20site.