@article{ELA_2007__16__a33,
     author = {Cheng, Bo and Liu, Bolian},
     title = {On the nullity of graphs},
     journal = {The electronic journal of linear algebra},
     pages = {60--67},
     publisher = {mathdoc},
     volume = {16},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2007__16__a33/}
}