@article{01780265, title = {Free objects in the category of geometries.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {765-770}, doi = {10.1155/S0161171201010729}, zbl = {0998.05009}, language = {en}, url = {http://dml.mathdoc.fr/item/01780265} }
Al-Hawary, Talal Ali. Free objects in the category of geometries.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 765-770. doi : 10.1155/S0161171201010729. http://gdmltest.u-ga.fr/item/01780265/