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@article{KJM_2003_25_a3, author = {Ivan Gutman}, title = {Graphs with smallest sum of squares of vertex degrees}, journal = {Kragujevac Journal of Mathematics}, pages = {51 }, publisher = {mathdoc}, volume = {25}, year = {2003}, zbl = {1052.05024}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KJM_2003_25_a3/} }
Ivan Gutman. Graphs with smallest sum of squares of vertex degrees. Kragujevac Journal of Mathematics, Tome 25 (2003), p. 51 . http://geodesic.mathdoc.fr/item/KJM_2003_25_a3/