Towards a computation system based on set theory,. Beeson, M. Theoretical Computer Science, 60:297-340, 1988.  
Pdf  bibtex   @article{beeson1988b,
	author = {Michael Beeson},
	date-added = {2014-11-14 21:47:14 +0000},
	date-modified = {2014-11-14 21:48:38 +0000},
	journal = {Theoretical Computer Science},
	keywords = {Logic, Set theory, Symbolic computation},
	pages = {297-340},
	title = {Towards a computation system based on set theory,},
	url_pdf = {beeson1988b.pdf},
	volume = {60},
	year = {1988}} 
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