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@article{MAN_1928__98_159226, author = {A. Heyting}, title = {Zur intuitionistischen {Axiomatik} der projektiven {Geometrie}}, journal = {Mathematische Annalen}, pages = {491--538}, publisher = {mathdoc}, volume = {98}, year = {1928}, zbl = {53.0541.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1928__98_159226/} }
A. Heyting. Zur intuitionistischen Axiomatik der projektiven Geometrie. Mathematische Annalen, Tome 98 (1928), pp. 491-538. http://geodesic.mathdoc.fr/item/MAN_1928__98_159226/