Kozłowski, Waldemar. «Model for Evaluation of the Economic-Social-Environmental Outcomes of Investments in Road Transport Infrastructure». Olsztyn Economic Journal 7, no. 1 (junio 30, 2012): 63–73. Accedido mayo 17, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/3406.