@article{GDZPPN002541742,
title = {The middle graph of a hypergraph},
journal = {Revista colombiana de matematicas},
volume = {24},
year = {1990},
pages = {97-102},
zbl = {0757.05085},
url = {http://dml.mathdoc.fr/item/GDZPPN002541742}
}
Marcu, Danut. The middle graph of a hypergraph. Revista colombiana de matematicas, Tome 24 (1990) pp. 97-102. http://gdmltest.u-ga.fr/item/GDZPPN002541742/