CHOW, Hing Lun. Limit Measures on Compact Semitopological Semigroups. Mathematica Scandinavica, Berkeley, CA, United States, v. 33, p. 375–381, 1973. DOI: 10.7146/math.scand.a-11498. Disponível em: https://journals.msp.org/mscand/article/view/2169. Acesso em: 25 jul. 2026.