@article{KJM_2000_22_1_a5,
     author = {Xueliang Li and Ivan Gutman},
     title = {Elementary proof of the reality of the zeros of beta-polynomials of complete graphs},
     journal = {Kragujevac Journal of Mathematics},
     pages = {49 - 56},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2000},
     zbl = {1010.05057},
     url = {http://geodesic.mathdoc.fr/item/KJM_2000_22_1_a5/}
}