@article{AM2_1980__20_182383,
     author = {Joseph A. Gallian and Charles A. Marttila},
     title = {Reorienting regular n-gons.},
     journal = {Aequationes mathematicae},
     pages = {97--103},
     publisher = {mathdoc},
     volume = {20},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/AM2_1980__20_182383/}
}