@article{JGG_2001_5_1_a1,
     author = {P. Pech},
     title = {The {Harmonic} {Analysis} of {Polygons} and {Napoleon's} {Theorem}},
     journal = {Journal for geometry and graphics},
     pages = {013--022},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JGG_2001_5_1_a1/}
}