ECHTERHOFF, S.; RAEBURN, Iain. Multipliers of Imprimitivity Bimodules and Morita Equivalence of Crossed Products. Mathematica Scandinavica, Berkeley, CA, United States, v. 76, p. 289–309, 1995. DOI: 10.7146/math.scand.a-12543. Disponível em: https://journals.msp.org/mscand/article/view/1084. Acesso em: 25 jul. 2026.