@article{CMJ_2010_60_2_a7,
     author = {Liu, Ying and Sun, Yu Qin},
     title = {On the second {Laplacian} spectral moment of a graph},
     journal = {Czechoslovak Mathematical Journal},
     pages = {401--410},
     year = {2010},
     volume = {60},
     number = {2},
     mrnumber = {2657957},
     zbl = {1224.05312},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2010_60_2_a7/}
}