@article{ELA_2004__11__a1,
     author = {Barrett, Wayne and van der Holst, Hein and Loewy, Raphael},
     title = {Graphs whose minimal rank is two},
     journal = {The electronic journal of linear algebra},
     pages = {258--280},
     publisher = {mathdoc},
     volume = {11},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2004__11__a1/}
}