@article {MATHEDUC.06103200,
author = {DeMaio, Joe},
title = {Counting triangles to sum squares.},
year = {2012},
journal = {The College Mathematics Journal},
volume = {43},
number = {4},
issn = {0746-8342},
pages = {297-303},
publisher = {Mathematical Association of America (MAA), Washington, D.C.},
doi = {10.4169/college.math.j.43.4.297},
abstract = {Summary: Counting complete subgraphs of three vertices in complete graphs, yields combinatorial arguments for identities for sums of squares of integers, odd integers, even integers and sums of the triangular numbers.},
msc2010 = {K35xx (K25xx F65xx)},
identifier = {2012f.00866},
}