Lewis Carroll - Wikipedia
Lewis Carroll: Logic Internet Encyclopedia of Philosophy
Logic in Wonderland
MATHEMATICS QUOTES [PAGE - 19]
Alan Turing and Lewis Carroll – The Old Shirburnian Society
Maths and Mad Hatters (Jascha Hoffman)
Selected Mathematical Works, Symbolic Logic + The Game of Logic +
Lewis Carroll's Playful Notes - by Jillian Hess - Noted
Lewis Carroll Logic puzzles - Undergraduate