Balti basseini fosforiidid : bibliograafia 1829-1990 = Phosphorites of the Baltic basin = Фосфориты Прибалтийского бассейна1992 https://www.ester.ee/record=b1063135*est

Institutional matrix and industrial change in post-socialist VyborgKosonen, RiittaTheoretical aspects of the transitioning economy : proceedings of the 29th Baltic Conference of Teachers of Economic Theory, Tallinn, May 19-20, 19941994 / p. 25-26