@article{105005,
author = {Petr Vop\v enka and Ale\v s Pultr and Zden\v ek Hedrl\'\i n},
title = {A rigid relation exists on any set},
journal = {Commentationes Mathematicae Universitatis Carolinae},
volume = {006},
year = {1965},
pages = {149-155},
zbl = {0149.01402},
mrnumber = {0183647},
language = {en},
url = {http://dml.mathdoc.fr/item/105005}
}
Vopěnka, Petr; Pultr, Aleš; Hedrlín, Zdeněk. A rigid relation exists on any set. Commentationes Mathematicae Universitatis Carolinae, Tome 006 (1965) pp. 149-155. http://gdmltest.u-ga.fr/item/105005/
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