Труды экономического факультетаHalling, Aimar; Reisenbuk, Helgi-Annika; Kamratov, Ardo; Malmstein, K.; Malmstein, Raul; Lumiste, Rein; Link, Mari; Lageda, Peeter; Lageda, Elvi1987 https://www.ester.ee/record=b1274562*est