TORNEHAVE, H. On the Fourier series of Stepanov almost periodic functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 2, p. 236–241, 1954. DOI: 10.7146/math.scand.a-10410. Disponível em: https://www.mscand.dk/article/view/10410. Acesso em: 2 may. 2024.