%0 Journal Article %A Takashi Nishimura %T Kato's chaos created by quadratic mappings associated with spherical orthotomic curves %J Journal of Singularities %D 2020 %P 205-211 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5427/jsing.2020.21l/ %R 10.5427/jsing.2020.21l %F 10_5427_jsing_2020_21l