@article {MR3499557, AUTHOR = {Feischl, Michael and Praetorius, Dirk and van der Zee, Kristoffer G.}, TITLE = {An abstract analysis of optimal goal-oriented adaptivity}, JOURNAL = {SIAM J. Numer. Anal.}, FJOURNAL = {SIAM Journal on Numerical Analysis}, VOLUME = {54}, YEAR = {2016}, NUMBER = {3}, PAGES = {1423--1448}, ISSN = {0036-1429}, MRCLASS = {65N30 (65N50 65Y20)}, MRNUMBER = {3499557}, MRREVIEWER = {Arnd Meyer}, DOI = {10.1137/15M1021982}, URL = {https://doi.org/10.1137/15M1021982}, }