@article{1093890809, author = {Roberts, Fred S.}, title = {Tolerance geometry.}, journal = {Notre Dame J. Formal Logic}, volume = {14}, number = {1}, year = {1973}, pages = { 68-76}, language = {en}, url = {http://dml.mathdoc.fr/item/1093890809} }
Roberts, Fred S. Tolerance geometry.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp. 68-76. http://gdmltest.u-ga.fr/item/1093890809/