Working papers in economics. Volume 22 (TUTWPE No 155-158)
Alver, Jaan
;
Listra, Enn
;
Randveer, Mare
;
Paadam, Katrin
;
Saat, Maksim
;
Venesaar, Urve
2007
https://www.ester.ee/record=b1275334*est