\newcommand{\citepmulti}[2]{
  \def\pagelist{{#1}}
  (\foreach [count=\i] \s in {#2} {
    \pgfmathparse{\pagelist[\i - 1]}
    \citealp[p.\pgfmathresult]{\s}})
}

%% anropas med \citepmulti{54,32},{turing32, church31} och producerar (turing ..., p.54 church... p.32)