- Combinatorial group theory
- Van Kampen diagrams: an intuition
- DIY Hyperbolic geometry
- Hyperbolic Embeddings with a Hopefully Right Amount of Hyperbole
- Notes on Hyperbolic geometry by Canon
- A question on
`math.se`

that attempts to describe hyperbolic space: What hyperbolic space really looks like - Another question about what hyperbolic space feels like
- Notes On Hyperbolic and Automatic Groups: Michael Batty
- The geometry of the word problem by Martin R Bridson
- Living in Hyperbolic space
- We can embed euclidian space into hyperbolic space
- Amsler surface: A surface with constant negative gaussian curvature
- Hyperbolic distance naturally measures distance as paths of light with varying refractive index
- The pseudosphere, another surface with constant negative curvature
- Whalesong, selected discography