@article{1183419155, author = {Richardson, S. F.}, title = {Note on systems of IN-- and circumscribed polygons}, journal = {Bull. Amer. Math. Soc.}, volume = {14}, number = {3}, year = {1907}, pages = { 177-182}, language = {en}, url = {http://dml.mathdoc.fr/item/1183419155} }
Richardson, S. F. Note on systems of IN– and circumscribed polygons. Bull. Amer. Math. Soc., Tome 14 (1907) no. 3, pp. 177-182. http://gdmltest.u-ga.fr/item/1183419155/