THOMAS, Aaron; MAY, Russell. Mountain Counting: On the Enumeration of Three-Dimensional Stacks of Spheres. The PUMP Journal of Undergraduate Research, [S. l.], v. 5, p. 70–79, 2022. DOI: 10.46787/pump.v5i0.2664. Disponível em: https://journals.calstate.edu/pump/article/view/2664. Acesso em: 3 jul. 2024.