Bernhard Endtmayer Ulrich Langer Jan Philipp Thiele Thomas Wick Hierarchical DWR Error Estimates for the Navier-Stokes Equations: h and p Enrichment. 363-372 2019 ENUMATH https://doi.org/10.1007/978-3-030-55874-1_35 conf/enumath/2019 db/conf/enumath/enumath2019.html#EndtmayerLTW19