@article{01208019, title = {Lower levels of Euclidean planes.}, journal = {Beitr\"age zur Algebra und Geometrie}, volume = {39}, year = {1998}, pages = {467-472}, zbl = {0923.51015}, language = {en}, url = {http://dml.mathdoc.fr/item/01208019} }
Quaisser, Erhard. Lower levels of Euclidean planes.. Beiträge zur Algebra und Geometrie, Tome 39 (1998) pp. 467-472. http://gdmltest.u-ga.fr/item/01208019/