Deep Learning, Ian Goodfellow, Yoshua Bengio, and Aaron Courville, 2016 (MIT Press) - A comprehensive textbook where Chapter 8 provides an explanation of backpropagation as an application of reverse-mode automatic differentiation in neural networks.
Autograd mechanics, PyTorch Contributors, 2024 - The official PyTorch documentation explaining the inner workings of its Autograd engine, including computation graphs and the backward pass for gradient computation.