CHODAKOWSKA, Ewa; NAZARKO, Joanicjusz. Environmental DEA method for assessing productivity of European countries. Technological and Economic Development of Economy, [S. l.], v. 23, n. 4, p. 589–607, 2017. DOI: 10.3846/20294913.2016.1272069. Disponível em: https://journals.vilniustech.lt/index.php/TEDE/article/view/652. Acesso em: 19 jul. 2025.