Sketching the basics by Koos Eissen Roselien Steur (z-lib.org)
KODAK Capture software
Ringworld
Larry Niven
Ringworld (1)
Ring
Stephen Baxter
Xeelee (4)
Tetralogue: I'm Right, You're Wrong
Timothy Williamson
Vacuum Diagrams
Xeelee (5)
Timelike Infinity
Xeelee (2)