@unpublished{TUW-229940, author = {Templ, Matthias and Hron, Karel and Filzmoser, Peter}, title = {The Problem of Missing Values and Rounded Zeros in Compositional Data}, year = {2014}, keywords = {Compositional Data, Missing Values, Rounded Zeros, Partial Least Squares Regression, Robust Estimation}, note = {invited; talk: Joint Statistical Meeting, Boston, MA, USA; 2014-08-03} }