CARLITZ, L. A note on exponential sums. MATHEMATICA SCANDINAVICA, [S. l.], v. 42, p. 39–48, 1978. DOI: 10.7146/math.scand.a-11734. Disponível em: https://www.mscand.dk/article/view/11734. Acesso em: 4 may. 2024.