Deep Learning, Ian Goodfellow, Yoshua Bengio, and Aaron Courville, 2016 (MIT Press) - A comprehensive textbook providing an academic treatment of recurrent neural networks, with a dedicated section on GRUs that explains their structure and gating mechanisms for managing information flow.
Dive into Deep Learning, Aston Zhang, Zachary C. Lipton, Mu Li, and Alex Smola, 2024 (Cambridge University Press) - An interactive online textbook that offers clear, accessible explanations of GRUs, including the mathematical formulation of the hidden state calculation, often supplemented with practical code examples.