ŻÓŁTASZEK, Agata. Leaders And Followers In The Effectiveness Of Public Safety Services In European States – A Spatial Frontier Approach. Comparative Economic Research. Central and Eastern Europe, [S. l.], v. 17, n. 4, p. 253–272, 2014. DOI: 10.2478/cer-2014-0044. Disponível em: https://www.czasopisma.uni.lodz.pl/CER/article/view/7039. Acesso em: 10 dec. 2025.