A collapsing sandpile problem with nonlocal boundary condition. Gulf Journal of Mathematics, [S. l.], v. 12, n. 1, p. 81–103, 2022. DOI: 10.56947/gjom.v12i1.779. Disponível em: https://gjom.org/index.php/gjom/article/view/779. Acesso em: 23 aug. 2026.