Practical Foundations of Mathematics - http://www.cs.man.ac.uk/~pt/Practical_Foundations/index.html
By Paul Taylor (CUP, 2000). Table of contents, bibliography, text without diagrams. |
Proofs and Types - http://www.dcs.qmul.ac.uk/%7Ept/stable/Proofs+Types.html
By Jean-Yves Girard, Yves Lafont and Paul Taylor (CUP,1989). Full text online (DVI,PDF,PS). |