@article{10_4064_ap_24_1_27_33,
     author = {E. Siwek},
     title = {Sur les comitantes alg\'ebriques des objets g\'eom\'etriques non transitifs},
     journal = {Annales Polonici Mathematici},
     pages = {27--33},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1970},
     doi = {10.4064/ap-24-1-27-33},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-24-1-27-33/}
}