Geodesic
A Note on Free Planar Extensions.
Mathematische Zeitschrift, Tome 119 (1971), pp. 281-282.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : foundations of geometry 
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     author = {Norman L. Johnson},
     title = {A {Note} on {Free} {Planar} {Extensions.}},
     journal = {Mathematische Zeitschrift},
     pages = {281--282},
     publisher = {mathdoc},
     volume = {119},
     year = {1971},
     zbl = {0199.24303},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__119_171499/}
}
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Norman L. Johnson. A Note on Free Planar Extensions.. Mathematische Zeitschrift, Tome 119 (1971), pp. 281-282. http://geodesic.mathdoc.fr/item/MZ_1971__119_171499/