@article{1077476114,
author = {Green, John W.},
title = {Sets subtending a constant angle on a circle},
journal = {Duke Math. J.},
volume = {17},
number = {1},
year = {1950},
pages = { 263-267},
language = {en},
url = {http://dml.mathdoc.fr/item/1077476114}
}
Green, John W. Sets subtending a constant angle on a circle. Duke Math. J., Tome 17 (1950) no. 1, pp. 263-267. http://gdmltest.u-ga.fr/item/1077476114/