1. Inference and missing data;Rubin;Biometrika,1976
2. Distinguishing ‘missing at random’ and ‘missing completely at random’;Heitjan;Am. Stat.,1996
3. Estimators for the population mean in the case of missing data;Kadilar;Commun. Stat., Theory Methods,2008
4. Improved estimators of the population mean for missing data;Diana;Commun. Stat., Theory Methods,2010
5. Optimal imputation of missing data for estimation of population mean;Bhushan;J. Stat. Manag. Syst.,2016