M. Innerberger, D. Praetorius:
"Instance-Optimal Goal-Oriented Adaptivity";
Talk: RMMM 2019 - Reliable Methods of Mathematical Modeling, TU Wien; 2019-09-09 - 2019-09-13.
see p.40 in https://www.asc.tuwien.ac.at/rmmm2019/download/rmmm2019-abstracts.pdf