@article{10_4153_CMB_1978_058_5,
     author = {Slater, Peter J.},
     title = {A {Characterization} of {Soft} {Hypergraphs}},
     journal = {Canadian mathematical bulletin},
     pages = {335--337},
     year = {1978},
     volume = {21},
     number = {3},
     doi = {10.4153/CMB-1978-058-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-058-5/}
}