==== mathematical surfaces ====
  * http://math.harvard.edu/%7Eangelavc/models/index.html
  * [[implicit surfaces]]
  * in general [[category geometry]] / / [[category mathematics]]

==== Felix Klein & strange surfaces in service of the constructionists ====
  * http://math.bu.edu/people/angelav/projects/models/art.html
  * http://dataisnature.com/?p=380