PAWŁOWSKI, Michał. Alternative structures of railroad subgrade protective layers. Roads and Bridges – Drogi i Mosty, [S. l.], v. 22, n. 4, p. 313–329, 2023. DOI: 10.7409/rabdim.023.016. Disponível em: https://rabdim.pl/index.php/rb/article/view/v22n4p313. Acesso em: 25 apr. 2025.