@article{2207, author = {Green, John W.}, title = {On the chords of a convex curve - II}, journal = {Portugaliae mathematica}, volume = {11}, year = {1952}, pages = {51-55}, zbl = {0046.16001}, mrnumber = {0051536}, language = {en}, url = {http://dml.mathdoc.fr/item/2207} }
Green, John W. On the chords of a convex curve - II. Portugaliae mathematica, Tome 11 (1952) pp. 51-55. http://gdmltest.u-ga.fr/item/2207/