1. Khronos OpenCL Working Group, The OpenCL Specification Version 2.2, 2016.
2. OpenMP Architecture Review Board, OpenMP Application Programming Interface Version 4.5, 2015.
3. OpenACC-Standard.org, The OpenACC Application Programming Interface Version 2.5, 2015.
4. DOE Centres of Excellence Performance Portability Meeting: Post-meeting Report, Tech. Rep. LLNL-TR-700962, Lawrence Livermore National Laboratory, 2016.
5. Liszt: A domain specific language for building portable mesh-based PDE solvers;DeVito,2011