Some theories conservative over intuitionistic arithmetic. Beeson, M. In Logic and Computation, volume 106, of Contemporary Mathematics. American Mathematical Society, Providence, R. I., 1987.  bibtex   @incollection{beeson1987,
	address = {Providence, R.~I.},
	author = {Michael Beeson},
	booktitle = {Logic and Computation},
	date-added = {2014-11-14 21:43:00 +0000},
	date-modified = {2014-11-14 21:44:29 +0000},
	keywords = {Logic, Constructive mathematics},
	publisher = {American Mathematical Society},
	series = {Contemporary Mathematics},
	title = {Some theories conservative over intuitionistic arithmetic},
	volume = {106},
	year = {1987}} 
Downloads: 0
{"_id":"E7Qov86w3gdmiRxbX","bibbaseid":"beeson-sometheoriesconservativeoverintuitionisticarithmetic-1987","author_short":["Beeson, M."],"bibdata":{"bibtype":"incollection","type":"incollection","address":"Providence, R. I.","author":[{"firstnames":["Michael"],"propositions":[],"lastnames":["Beeson"],"suffixes":[]}],"booktitle":"Logic and Computation","date-added":"2014-11-14 21:43:00 +0000","date-modified":"2014-11-14 21:44:29 +0000","keywords":"Logic, Constructive mathematics","publisher":"American Mathematical Society","series":"Contemporary Mathematics","title":"Some theories conservative over intuitionistic arithmetic","volume":"106","year":"1987","bibtex":"@incollection{beeson1987,\n\taddress = {Providence, R.~I.},\n\tauthor = {Michael Beeson},\n\tbooktitle = {Logic and Computation},\n\tdate-added = {2014-11-14 21:43:00 +0000},\n\tdate-modified = {2014-11-14 21:44:29 +0000},\n\tkeywords = {Logic, Constructive mathematics},\n\tpublisher = {American Mathematical Society},\n\tseries = {Contemporary Mathematics},\n\ttitle = {Some theories conservative over intuitionistic arithmetic},\n\tvolume = {106},\n\tyear = {1987}}\n\n","author_short":["Beeson, M."],"key":"beeson1987","id":"beeson1987","bibbaseid":"beeson-sometheoriesconservativeoverintuitionisticarithmetic-1987","role":"author","urls":{},"keyword":["Logic","Constructive mathematics"],"metadata":{"authorlinks":{}}},"bibtype":"incollection","biburl":"http://www.michaelbeeson.com/research/papers/beeson.bib","dataSources":["v9esbf6gQ8h64d3NA"],"keywords":["logic","constructive mathematics"],"search_terms":["theories","conservative","over","intuitionistic","arithmetic","beeson"],"title":"Some theories conservative over intuitionistic arithmetic","year":1987}