PICHUGIN, S. F.; CHICHULIN, V. P.; CHICHULINA, K. V. SPATIAL STRUCTURES OF CLOSED PROFILES. Academic journal Industrial Machine Building Civil Engineering, [S. l.], v. 1, n. 48, p. 138–143, 2017. DOI: 10.26906/znp.2017.48.787. Disponível em: https://journals.nupp.edu.ua/znp/article/view/787. Acesso em: 14 dec. 2025.