BARLET, Daniel. On principal value and standard extension of distributions. Mathematica Scandinavica, Berkeley, CA, United States, v. 129, n. 2, 2023. DOI: 10.7146/math.scand.a-134458. Disponível em: https://journals.msp.org/mscand/article/view/88. Acesso em: 24 jul. 2026.