Working papers in economics. Vol. 15 (TUTWPE No 125-128)
Alver, Jaan
;
Listra, Enn
;
Randveer, Mare
;
Paadam, Katrin
;
Saat, Maksim
;
Venesaar, Urve
2005
https://www.ester.ee/record=b1275334*est