Automatic differentiation with torch.autograd, PyTorch Foundation, 2017 - The primary official documentation for PyTorch's automatic differentiation engine and its underlying computation graphs.
Deep Learning, Ian Goodfellow, Yoshua Bengio, and Aaron Courville, 2016 (MIT Press) - A foundational textbook offering theoretical background on automatic differentiation and computation graphs in a general context.
Autograd mechanics, PyTorch Foundation, 2017 (PyTorch Foundation) - An official PyTorch tutorial that offers a practical, detailed exploration of Autograd's mechanics and graph-based operations.