Composition Operators on Haagerup $L^p$-spaces
  Building on the ideas in L E Labuschagne, Composition Operators on Non-commutative $L^p$-spaces, \textit{Expo. Math} \textbf{17}(1999), 429--468, we indicate how the concept of a composition operator may be extended to the context of Haagerup $L^p$-spaces. 
S. J. Goldstein, L. E. Labuschagne