Jemioło, S., and M. Kwieciński. “On Irreducible Number of Invariants and Generators in the Constitutive Relationships”. Engineering Transactions 39, no. 2 (June 30, 1991): 241–253. Accessed March 19, 2026. https://et.ippt.gov.pl/index.php/et/article/view/1625.