@unpublished{GilchGriebelOettershagen2020,
  author = {Gilch, Alexandros and Griebel, Michael and Oettershagen, Jens},
  title = {Multilevel Approximation for generalized
Method of Moments Estimators},
  annote = {article, inspreprint},
  note = {Submitted to International Journal for Uncertainty Quantification. Available as INS Preprint No. 2006},
  inspreprintnum = {2006},
  year = {2020}
}