@article{PIM_2014_N_S_95_109_a13,
     author = {Vladimir Nikiforov},
     title = {An {Asymptotically} {Tight} {Bound} on the $Q$-index of {Graphs} with {Forbidden} {Cycles}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {189 },
     year = {2014},
     volume = {_N_S_95},
     number = {109},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2014_N_S_95_109_a13/}
}