• Cournotian oligopoly with continuos time and adjustment costListra, Enn5th International Conference on Optimal Research "Simulation and Optimization in Business and Industry" : May 17-20, 2006, Tallinn, Estonia : programme and abstracts2006 / p. 27
  • Oligopoliteooria ja -mudelidKonkurents, turg ja turundus : (teaduslik-referatiivne kogumik). 1. osa1991 / lk. 163-223: ill https://www.ester.ee/record=b1185898*est
  • On the uniqueness of the conjectural variations in oligopoly theoryListra, EnnPapers of the 4th Conference on Financial Sector Reform in Central and Eastern Europe, 24-26 April 1998, Tallinn. Vol. 21998 / p. 207-212
  • Perfektne oligopolListra, EnnMajanduspoliitika teooria ja praktika Eesti Vabariigis : artiklid ja ettekannete teesid, (Tartu-Värska-Tartu, 25.-26. august 1995)1995 / lk. 56-59
  • The development and structure of banking sector : retail banking in EstoniaListra, Enn2001 https://www.ester.ee/record=b1570023*est