CHALENDAR, I.; GORKIN, P.; PARTINGTON, J. R.; ROSS, W. T. Clark measures and a theorem of Ritt. MATHEMATICA SCANDINAVICA, [S. l.], v. 122, n. 2, p. 277–298, 2018. DOI: 10.7146/math.scand.a-104444. Disponível em: https://www.mscand.dk/article/view/104444. Acesso em: 18 apr. 2024.