HEDBERG, Torbjörn. A Phragmén-Lindelöf Type Theorem for a Certain Class of Generalized Subharmonic Functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 28, p. 202–206, 1971. DOI: 10.7146/math.scand.a-11016. Disponível em: https://www.mscand.dk/article/view/11016. Acesso em: 5 dec. 2025.