SCIMA valintakori viitteet

lkm: 2
1.
Economisch Statistische Berichte
1984 : MAY 23, VOL. 69:3456, p. 468-472
1984 Wever, E.
2.
Reform of Economic System (c)
1993 : 5, p.90-93
1993 Chen, Jian
SCIMA