PAVLYUK, Yaroslav. Calculation of non-stationary creep deformations of nonlinear viscoelastic materials under the conditions of loading and unloading using the Heaviside function. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics, [S. l.], v. 78, n. 1, p. 74–77, 2024. DOI: 10.17721/1812-5409.2024/1.14. Disponível em: https://bphm.knu.ua/bphm/article/view/474. Acesso em: 16 oct. 2026.