Kent F. Milfeld, Bronis R. de Supinski, Lars Koesterke, Jannis Klinkenberg: OpenMP: Portable Multi-Level Parallelism on Modern Systems - 16th International Workshop on OpenMP, IWOMP 2020, Austin, TX, USA, September 22-24, 2020, Proceedings. Lecture Notes in Computer Science 12295, Springer 2020, ISBN 978-3-030-58143-5