Behrends, Erhard. “Multiplier Representations and an Application to the Problem Whether $A\otimes_\varepsilon X$ Determines $A$ and Or $X$”. Mathematica Scandinavica 52 (December 1, 1983): 117–144. Accessed July 25, 2026. https://journals.msp.org/mscand/article/view/1619.