TORNEHAVE, Hans. On the Fourier series of Stepanov almost periodic functions. Mathematica Scandinavica, Berkeley, CA, United States, v. 2, p. 236–241, 1954. DOI: 10.7146/math.scand.a-10410. Disponível em: https://journals.msp.org/mscand/article/view/2914. Acesso em: 8 sep. 2026.