@article{DIA_2009__61-62__1_0, author = {Bjerrum, Marie}, title = {A {Sketch} theoretical survey {Towards} a typology of mathematical structures}, journal = {Diagrammes}, pages = {1--63}, publisher = {Universit\'e Paris 7, Unit\'e d'enseignement et de recherche de math\'ematiques}, volume = {61-62}, year = {2009}, language = {en}, url = {http://archive.numdam.org/item/DIA_2009__61-62__1_0/} }