Causal Inference: What If, Miguel A. Hernan and James M. Robins, 2020 (CRC Press) - Comprehensive textbook chapter on causal inference with time-varying treatments and dynamic regimes, covering foundational concepts and assumptions.
Optimal dynamic treatment regimes, Susan A. Murphy, 2003Journal of the Royal Statistical Society: Series B (Statistical Methodology), Vol. 65 (Royal Statistical Society)DOI: 10.1111/1467-9868.00392 - Foundational paper formally defining and exploring optimal dynamic treatment regimes.