References
- Little, J. A., Rubin, D. B. (2002). Statistical Analysis with Missing Data, 2nd ed. New York, NY: John Wiley & Sons.
- Rubin, D. B. (1987). Multiple Imputation for Nonresponse in Surveys. New York, NY: John Wiley & Sons.
- Schafer, J. L. (1997). Analysis of Incomplete Multivariate Data. New York, NY: CRC Press.