The Theory of Proportionality as an Abstraction of Group Theory.
Mathematische Annalen, Tome 130 (1955), pp. 102-108
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@article{MAN_1955__130_160454,
author = {J.B. B\"uchi and J.B. Wright},
title = {The {Theory} of {Proportionality} as an {Abstraction} of {Group} {Theory.}},
journal = {Mathematische Annalen},
pages = {102--108},
publisher = {mathdoc},
volume = {130},
year = {1955},
zbl = {0065.00902},
url = {http://geodesic.mathdoc.fr/item/MAN_1955__130_160454/}
}
J.B. Büchi; J.B. Wright. The Theory of Proportionality as an Abstraction of Group Theory.. Mathematische Annalen, Tome 130 (1955), pp. 102-108. http://geodesic.mathdoc.fr/item/MAN_1955__130_160454/