IDZ decision Ryabushko A.P. Option 15

15 Variant: IDZ 1.1 IDZ 1.2 IDZ 2.1 IDZ 2.2 IDZ 3.1 IDZ 3.2 IDZ 4.1 IDZ 4.2 IDZ 5.1 IDZ 5.2 IDZ 6.1 IDZ 6.2 IDZ 6.3 IDZ 6.4