@article{PIM_2001_N_S_69_83_a6,
     author = {Yong Wang and Xueliang Li and Ivan Gutman},
     title = {More {Examples} and {Counterexamples} for a {Conjecture} of {Merrifield} and {Simmons}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {41 },
     publisher = {mathdoc},
     volume = {_N_S_69},
     number = {83},
     year = {2001},
     zbl = {0997.05069},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2001_N_S_69_83_a6/}
}