Abid (Al-Baldawi), A., and O. Wünsch. “Some New Aspects of the Invariants of the Rate of Deformation Tensor and Their Application in Viscoelastic Polymer Melts”. Technische Mechanik - European Journal of Engineering Mechanics 32, no. 6 (July 9, 2019): 667–683. Accessed May 5, 2024. https://journals.ub.ovgu.de/index.php/techmech/article/view/756.