OSAKA, Hiroyuki; SILVESTROV, Sergei; TOMIYAMA, Jun. Monotone operator functions, gaps and power moment problem. Mathematica Scandinavica, Berkeley, CA, United States, v. 100, n. 1, p. 161–183, 2007. DOI: 10.7146/math.scand.a-15019. Disponível em: https://journals.msp.org/mscand/article/view/678. Acesso em: 24 jul. 2026.