@article{DMGT_2009_29_2_a7,
     author = {Galeana-S\'anchez, Hortensia and Manrique, Mart{\'\i}n},
     title = {Directed hypergraphs: a tool for researching digraphs and hypergraphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {313--335},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2009_29_2_a7/}
}