@article{10_4064_ap_34_3_233_242,
     author = {Hiroshi Haruki},
     title = {An equivalent property to {Ivory's} theorem from the standpoint of conformal mapping},
     journal = {Annales Polonici Mathematici},
     pages = {233--242},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {1977},
     doi = {10.4064/ap-34-3-233-242},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-34-3-233-242/}
}