@article{10_21136_CMJ_1991_102478,
author = {Radelecki, S\'andor},
title = {Compatible tolerances on groupoids},
journal = {Czechoslovak Mathematical Journal},
pages = {436--445},
year = {1991},
volume = {41},
number = {3},
doi = {10.21136/CMJ.1991.102478},
mrnumber = {1117797},
zbl = {0768.20027},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102478/}
}
Radelecki, Sándor. Compatible tolerances on groupoids. Czechoslovak Mathematical Journal, Tome 41 (1991) no. 3, pp. 436-445. doi: 10.21136/CMJ.1991.102478
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