%0 Journal Article %A Hiroshi Haruki %T An equivalent property to Ivory's theorem from the standpoint of conformal mapping %J Annales Polonici Mathematici %D 1977 %P 233-242 %V 34 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-34-3-233-242/ %R 10.4064/ap-34-3-233-242 %G en %F 10_4064_ap_34_3_233_242