Differential forms
Chapter in General Relativity for the Gifted Amateur, Oxford University Press (OUP) (2025) 334-339
Duality and the volume form
Chapter in General Relativity for the Gifted Amateur, Oxford University Press (OUP) (2025) 386-396
Embedding
Chapter in General Relativity for the Gifted Amateur, Oxford University Press (OUP) (2025) 581-586
Exterior and Lie derivatives
Chapter in General Relativity for the Gifted Amateur, Oxford University Press (OUP) (2025) 340-350
Finding a theory of gravitation
Chapter in General Relativity for the Gifted Amateur, Oxford University Press (OUP) (2025) 68-80