BJON, Sten. Differentation under the integral sign and holomorphy. Mathematica Scandinavica, Berkeley, CA, United States, v. 60, p. 77–95, 1987. DOI: 10.7146/math.scand.a-12173. Disponível em: https://journals.msp.org/mscand/article/view/1456. Acesso em: 25 jul. 2026.