Inge Li Gørtz Signe Reuss Morten Heine Sørensen Strong Normalization from Weak Normalization by Translation into the Lambda-I-Calculus. 253-285 2003 16 Higher-Order and Symbolic Computation 3 http://dx.doi.org/10.1023/A:1025693307470 db/journals/lisp/lisp16.html#GortzRS03