WACŁAWIAK, Krzysztof. A Proposal of a Novel Geometrical Measure of Material Effort. Engineering Transactions, [S. l.], v. 70, n. 2, p. 183–199, 2022. DOI: 10.24423/EngTrans.1311.20220602. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/1311. Acesso em: 9 oct. 2025.