@article{10_4064_cm_3_1_41_43,
     author = {J. S{\l}upecki},
     title = {Sur la multiplication des types ordinaux},
     journal = {Colloquium Mathematicum},
     pages = {41--43},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1954},
     doi = {10.4064/cm-3-1-41-43},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-3-1-41-43/}
}