Morris, T. P., White, I. R., Carpenter, J. R., Stanworth, S. J., & Royston, P. (2015). Combining fractional polynomial model building with multiple imputation. John Wiley and Sons Inc.

Morris, Tim P., Ian R. White, James R. Carpenter, Simon J. Stanworth, and Patrick Royston. Combining Fractional Polynomial Model Building With Multiple Imputation. John Wiley and Sons Inc, 2015.

Morris, Tim P., et al. Combining Fractional Polynomial Model Building With Multiple Imputation. John Wiley and Sons Inc, 2015.