lff leksion 14 punto 2-5

w19.02 p. 22-23

w19.10 p. 26-31

rr kap. 5

rr kap. 15

rr kap. 22

w18.07 p. 20-21

w16 No. 6 p. 20-21

nwt p. 1975-1976

ijwbq artikulo 29 par. 3

w05 5/15 p. 22 par. 12

w02 10/15 p. 28-31

w95 9/15 p. 8-14