WVOQ #69 Willard Van Orman Quine - cleancut
http://www-groups.dcs.st-and.ac.uk/~history/Printonly/Quine.html - Structural cut elimination I. intuitionistic and classical logic. Information and Computation, 157(1/2):84141, March 2000.[Pol95] Robert Pollack.A verified typechecker. In M.Dezani-Ciancaglini and G.Plotkin, editors, Proceedings of the Second International Conference on Typed Lambda Calculi and Applications, TLCA95, Edinburgh, volume 902 of LNCS. Springer-Verlag, April 1995. Page 16 16 [Qui62] Willard Van Orman Quine. Mathematical Logic. Harper and Row, 1962. [Rid] Tom Ridge. Informatics homepage. http://homepages.inf.ed.ac.uk/s0128214/. [Sha94] N. Shankar. Metamathematics, Machines, and Godels Proof. Cambridge Tracts in Theoretical Computer Science. Cambridge University Press, Cam-bridge, UK, 1994. http://www.csl.sri.com/users/shankar/goedel-book.html. [T.F92] T.F. Melham. The HOL logic extended with quantification over type variables. In L.J.M. Claesen and