Chiyan Chen Dengping Zhu Hongwei Xi Implementing Cut Elimination: A Case Study of Simulating Dependent Types in Haskell. 239-254 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3057&spage=239 2004 conf/padl/2004 PADL db/conf/padl/padl2004.html#ChenZX04