STEIN, Erwin. Milestones of Direct Variational Calculus and its Analysis from the 17th Century until today and beyond – Mathematics meets Mechanics – with restriction to linear elasticity. Computer Assisted Methods in Engineering and Science, [S. l.], v. 25, n. 4, p. 141–225, 2019. DOI: 10.24423/cames.25.4.2. Disponível em: https://cames3.ippt.pan.pl/index.php/cames/article/view/256. Acesso em: 12 jan. 2025.