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.
<strong>Computer Assisted Methods in Engineering and Science</strong>, [S.l.], v. 25, n. 4, p. 141-225, july 2019.
ISSN 2956-5839.
Available at: &lt;<a href="https://cames.ippt.pan.pl/index.php/cames/article/view/256" target="_new">https://cames.ippt.pan.pl/index.php/cames/article/view/256</a>&gt;. Date accessed: 18 apr. 2024.
doi: <a href="http://dx.doi.org/10.24423/cames.25.4.2">http://dx.doi.org/10.24423/cames.25.4.2</a>.