DZINOTYIWEYI, H. A. M. Weakly almost periodic functions and irregularity of multiplication in semigroup algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 46, p. 157–172, 1980. DOI: 10.7146/math.scand.a-11859. Disponível em: https://www.mscand.dk/article/view/11859. Acesso em: 6 may. 2024.