%0 Journal Article %J Biometrika %D 2018 %T Shape-constrained partial identification of a population mean under unknown probabilities of sample selection %A Miratrix, Luke %A Wager, S. %A Zubizarreta, J %B Biometrika %V 105 %P 103-114 %G eng %U https://academic.oup.com/biomet/article-abstract/105/1/103/4774984 %N 1