@article{PDML_1987___1B_187_0,
     author = {Ouzilou, R.},
     title = {\'El\'ements de g\'eom\'etrie gradu\'ee},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {187--197},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     number = {1B},
     year = {1987},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1987___1B_187_0/}
}