@article{01196086,
title = {The number of triangles formed by intersecting diagonals of a regular polygon.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {1},
year = {1998},
zbl = {0898.51012},
language = {en},
url = {http://dml.mathdoc.fr/item/01196086}
}
Sommars, Steven E.; Sommars, Tim. The number of triangles formed by intersecting diagonals of a regular polygon.. Journal of Integer Sequences [electronic only], Tome 1 (1998) . http://gdmltest.u-ga.fr/item/01196086/