@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/