@article{107412,
author = {Bohdan Zelinka},
title = {Every connected acyclic digraph of height 1 is neighbourhood-realizable},
journal = {Archivum Mathematicum},
volume = {027},
year = {1991},
pages = {133-135},
zbl = {0758.05056},
mrnumber = {1189650},
language = {en},
url = {http://dml.mathdoc.fr/item/107412}
}
Zelinka, Bohdan. Every connected acyclic digraph of height 1 is neighbourhood-realizable. Archivum Mathematicum, Tome 027 (1991) pp. 133-135. http://gdmltest.u-ga.fr/item/107412/
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