@article{KJM_2002_24_1_a5,
     author = {Ivan Gutman},
     title = {The star is the tree with greatest greatest {Laplacian} eigenvalue},
     journal = {Kragujevac Journal of Mathematics},
     pages = {61 - 65},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2002},
     zbl = {1027.05060},
     url = {http://geodesic.mathdoc.fr/item/KJM_2002_24_1_a5/}
}