TARRIO, L. A.; RODICIO, A. G. On the upper semicontinuity intersection defect. Mathematica Scandinavica, Berkeley, CA, United States, v. 65, p. 161–164, 1989. DOI: 10.7146/math.scand.a-12275. Disponível em: https://journals.msp.org/mscand/article/view/1374. Acesso em: 24 jul. 2026.