%0 Journal Article %A Kroll, Martin %T Rate optimal estimation of quadratic functionals in inverse problems with partially unknown operator and application to testing problems %J ESAIM: Probability and Statistics %D 2019 %P 524-551 %V 23 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ps/2018027/ %R 10.1051/ps/2018027 %G en %F PS_2019__23__524_0