Baneshi, M. R., Garrusi, B., & Haji-Maghsoudi, S. (2014). Imputation of Missing Data for a Continuous Variable with an Ordinal form of Risk Function: When to Apply the Transformation?. International Journal of Statistics in Medical Research, 3(4), 378–383. https://doi.org/10.6000/1929-6029.2014.03.04.6