GRU layer, Keras Team, 2024 - Official Keras documentation providing details on how to use the GRU layer, its parameters, and functionalities within the Keras framework.
Deep Learning, Ian Goodfellow, Yoshua Bengio, and Aaron Courville, 2016 (MIT Press) - A foundational textbook offering a thorough theoretical explanation of recurrent neural networks, including LSTMs and GRUs, and their underlying principles.