@article{RCM_1990__24_3-4_181835,
     author = {Danut Marcu},
     title = {The middle graph of a hypergraph},
     journal = {Revista colombiana de matematicas},
     pages = {97--102},
     publisher = {mathdoc},
     volume = {24},
     number = {3-4},
     year = {1990},
     zbl = {0757.05085},
     url = {http://geodesic.mathdoc.fr/item/RCM_1990__24_3-4_181835/}
}