%0 Journal Article %A Imai, Hitoshi %A Ishimura, Naoyuki %A Ushijima, Takeo %T Motion of spirals by crystalline curvature %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1999 %P 797-806 %V 33 %N 4 %I EDP-Sciences %U http://geodesic.mathdoc.fr/item/M2AN_1999__33_4_797_0/ %G en %F M2AN_1999__33_4_797_0