@article{Köhler2014,
author = {Köhler, Carmen and Pohl, Steffi and Carstensen, Claus H.},
year = {2014},
language = {eng},
copyright = {http://www.uk.sagepub.com/aboutus/openaccess.htm},
title = {Taking the Missing Propensity Into Account When Estimating Competence Scores},
url = "http://dx.doi.org/10.17169/refubium-21468",
}