KRZYMIEŃ, Wiesław. Notes on the tests and vibration properties of hospital elevated helipad structures. Archives of Civil Engineering, [S. l.], v. 67, n. 3, p. 231–242, 2021. DOI: 10.24425/ace.2021.138053. Disponível em: https://wydawnictwo.pan.pl/index.php/ace/article/view/3811. Acesso em: 20 oct. 2026.