@article{PDML_1971__8_1_69_0,
     author = {Bonnet, R.},
     title = {Cat\'egorie et $\alpha $-cat\'egorie des ensembles ordonn\'es},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {69--90},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {8},
     number = {1},
     year = {1971},
     zbl = {0261.06002},
     mrnumber = {321819},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1971__8_1_69_0/}
}