Statistical Analysis with Missing Data, Roderick J.A. Little, Donald B. Rubin, 2019 (John Wiley & Sons)DOI: 10.1002/9781119013563 - A foundational statistical reference for understanding the theory of missing data mechanisms (MCAR, MAR, MNAR) and the principles of multiple imputation.
Imputation of missing values, scikit-learn developers, 2023 (scikit-learn) - Official scikit-learn documentation covering practical implementations of various imputation strategies, including KNNImputer and IterativeImputer for advanced techniques.