PASCHAL, Alex; SOMERS, Amy. The Variational Principle for Entropy of Countable State Shift Spaces with Specification. The PUMP Journal of Undergraduate Research, [S. l.], v. 9, p. 30–42, 2026. DOI: 10.46787/pump.v9i.6390. Disponível em: https://journals.calstate.edu/pump/article/view/6390. Acesso em: 16 feb. 2026.