@article{Schafer1998,
author = {Schafer, J.L. and Olsen, M.K.},
title= {Multiple imputation for multivariate missing-data problems: A data analyst's perspective},
year = {1998},
doi = {10.1207/s15327906mbr3304_5},
journal = {Multivariate Behavioral Research},
volume = {33},
number = {4},
pages = {545},
}