scikit-learn: Pipelines and composite estimators, scikit-learn developers, 2024 - Official documentation describing how Scikit-learn pipelines work, including their ability to chain transformers and estimators, and their role in preventing data leakage during model evaluation.
scikit-learn: Cross-validation: evaluating estimator performance, scikit-learn developers, 2024 (scikit-learn project) - Official documentation providing details on various cross-validation strategies available in Scikit-learn and their correct application with estimators and pipelines.