ANNIN, Scott; LOPEZ, Saul. Minimal Generating Sets of the Monoid of Partial Order-Preserving Injections. The PUMP Journal of Undergraduate Research, [S. l.], v. 3, p. 190–204, 2020. DOI: 10.46787/pump.v3i0.2324. Disponível em: https://journals.calstate.edu/pump/article/view/2324. Acesso em: 3 jul. 2024.