Some online resources where you can find these papers and more:

The search for is a search for mathematical clarity. In an era where machine learning and 3D engines rely increasingly on quaternions and Clifford algebras (used in TensorFlow and PyTorch geometric deep learning), Macdonald’s book is a time machine. It takes you from the 19th-century algebra you used in high school to the 21st-century algebra used in relativistic physics and robotics, without breaking your brain.