A game-theoretic model for analysis of investment decisions of portsBranten, Eva; Purju, AlariNOFOMA 2016 - proceedings of the 28th Annual Nordic Logistics Research Network Conference : 8-10 June 2016, Turku, Finland2016 / p. 681-684

Performance indicators to support evaluation of road investmentsKõrbe Kaare, Kati; Koppel, OttDiscussions on Estonian economic policy : theory and practice of economic policy2012 / p. 88-107 : ill https://ojs.utlib.ee/index.php/TPEP/article/view/832

Rail sector restructuring in the EU : implications for rail business environment in CEE countries [Electronic resource]Nežerenko, Olga; Koppel, Ott3rd International Conference „Economies of Central and Eastern Europe: Convergence, Opportunities and Challenges“, 12–14 June 2011, Tallinn, Estonia : conference proceedings2011 / p. 1-16 : ill. [CD-ROM]

Some implications of the EU rail transport policy on rail business environment in CEE countriesNežerenko, Olga; Koppel, OttBaltic journal of European studies2012 / p. 21-45 : ill https://www.ies.ee/iesp/No12/articles/02_Nezerenko_Koppel.pdf