@article{GDZPPN002031191, title = {On a geometric property of Lemniscates.}, journal = {Aequationes mathematicae}, volume = {18}, year = {1978}, pages = {344-347}, zbl = {0383.30001}, url = {http://dml.mathdoc.fr/item/GDZPPN002031191} }
Hwang, J.S.; Erdös, Paul. On a geometric property of Lemniscates.. Aequationes mathematicae, Tome 18 (1978) pp. 344-347. http://gdmltest.u-ga.fr/item/GDZPPN002031191/