BÖTTCHER, Albrecht; OTTE, Peter. The first Szegö limit theorem for non-selfadjoint operators in the Følner algebra. Mathematica Scandinavica, Berkeley, CA, United States, v. 97, n. 1, p. 115–126, 2005. DOI: 10.7146/math.scand.a-14967. Disponível em: https://journals.msp.org/mscand/article/view/730. Acesso em: 25 jul. 2026.