@article{GDZPPN002410818,
title = {A Characterization of the L\"uneburg Planes.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {82-90},
zbl = {0229.50028},
url = {http://dml.mathdoc.fr/item/GDZPPN002410818}
}
Liebler, Robert. A Characterization of the Lüneburg Planes.. Mathematische Zeitschrift, Tome 129 (1972) pp. 82-90. http://gdmltest.u-ga.fr/item/GDZPPN002410818/