DIAB, Sulaiman Abo.
 The natural boundary conditions as a variational basis for finite element methods.
<strong>Computer Assisted Methods in Engineering and Science</strong>, [S.l.], v. 8, n. 2-3, p. 213-226, mar. 2023.
ISSN 2956-5839.
Available at: &lt;<a href="https://cames.ippt.pan.pl/index.php/cames/article/view/1165" target="_new">https://cames.ippt.pan.pl/index.php/cames/article/view/1165</a>&gt;. Date accessed: 22 july 2024.