%0 Book Section %A Kubo, Izumi %T The motion of disks in a torus %B International conference on dynamical systems in mathematical physics %A Collectif %S Astérisque %D 1976 %P 113-116 %N 40 %I Société mathématique de France %U http://www.numdam.org/item/AST_1976__40__113_0/ %G en %F AST_1976__40__113_0