Holmstrom Sketch

http://www.ncatlab.org/nlab/show/sketch

http://www.abstractmath.org/Articles/Forms.htm

Some material can be found in the Elephant

http://mathoverflow.net/questions/82716/on-sketches-and-institutions

nLab page on Sketch

Created on June 9, 2014 at 21:16:15 by Andreas Holmström