@article{MAN_1930__102_159398,
     author = {A.H. Blue},
     title = {On the {Structure} of {Sets} of {Points} of {Classes} {One,} {Two} and {Three}},
     journal = {Mathematische Annalen},
     pages = {624--632},
     publisher = {mathdoc},
     volume = {102},
     year = {1930},
     zbl = {55.0055.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1930__102_159398/}
}