%0 Journal Article %F fcb2008 %A Frisch, A. %A Castagna, G. %A Benzaken, V. %T Semantic subtyping: dealing set-theoretically with function, union, intersection, and negation types %J Journal of the ACM (JACM) %V 55 %N 4 %I ACM %U http://www.diku.dk/hjemmesider/ansatte/henglein/papers/frisch2008.pdf %D 2008 %K algexp