GULICK, Denny. The $\sigma$-Compact-Open Topology and its Relatives. Mathematica Scandinavica, Berkeley, CA, United States, v. 30, p. 159–176, 1972. DOI: 10.7146/math.scand.a-11072. Disponível em: https://journals.msp.org/mscand/article/view/2255. Acesso em: 25 jul. 2026.