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4. Federal Law “On Investment Activities in the Russian Federation Carried Out in the Form of Capital Investments” dated February 25, 1999 No. 39-FZ (last edition) (1999) http://www.consultant.ru/document/cons_doc_LAW_22142.
5. Niek Mouter, European Journal of Transport and Infrastructure Research 18(4), pp. 389–412 (2018).