@article{2175,
author = {B\"uchi, J. Richard},
title = {Die Boole'sche partialordung und die Paarung von Gefuegen},
journal = {Portugaliae mathematica},
volume = {7},
year = {1948},
pages = {119-180},
zbl = {0038.02002},
mrnumber = {0034369},
language = {de},
url = {http://dml.mathdoc.fr/item/2175}
}
Büchi, J. Richard. Die Boole'sche partialordung und die Paarung von Gefuegen. Portugaliae mathematica, Tome 7 (1948) pp. 119-180. http://gdmltest.u-ga.fr/item/2175/