Richard F. Barrett Dylan T. Stark Courtenay T. Vaughan Ryan E. Grant Stephen L. Olivier Kevin T. Pedretti Toward an evolutionary task parallel integrated MPI + X programming model. 30-39 2015 PMAM@PPoPP https://doi.org/10.1145/2712386.2712388 conf/ppopp/2015pmam db/conf/ppopp/pmam2015.html#BarrettSVGOP15