@article{10_4064_cm_9_2_251_264,
     author = {P. van Albada},
     title = {Problems of order with respect to tetrahedral sextuples},
     journal = {Colloquium Mathematicum},
     pages = {251--264},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1962},
     doi = {10.4064/cm-9-2-251-264},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-9-2-251-264/}
}