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@article{KJM_2003_25_a2, author = {Kinkar Ch. Das}, title = {Sharp bounds for the sum of the squares of the degrees of a graph}, journal = {Kragujevac Journal of Mathematics}, pages = {31 }, publisher = {mathdoc}, volume = {25}, year = {2003}, zbl = {1051.05034}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KJM_2003_25_a2/} }
Kinkar Ch. Das. Sharp bounds for the sum of the squares of the degrees of a graph. Kragujevac Journal of Mathematics, Tome 25 (2003), p. 31 . http://geodesic.mathdoc.fr/item/KJM_2003_25_a2/