@article{1077490049,
author = {John, Fritz},
title = {Polar correspondence with respect to a convex region},
journal = {Duke Math. J.},
volume = {3},
number = {1},
year = {1937},
pages = { 355-369},
language = {en},
url = {http://dml.mathdoc.fr/item/1077490049}
}
John, Fritz. Polar correspondence with respect to a convex region. Duke Math. J., Tome 3 (1937) no. 1, pp. 355-369. http://gdmltest.u-ga.fr/item/1077490049/