Some conservation results on weak König's lemma. Simpson, S. G.; Tanaka, K.; and Yamazaki, T. Ann. Pure Appl. Logic, 118(1-2):87–114, 2002.
Paper doi bibtex @ARTICLE{STY02,
author = {Simpson, Stephen G. and Tanaka, Kazuyuki and Yamazaki, Takeshi},
title = {Some conservation results on weak {K}\"onig's lemma},
journal = {Ann. Pure Appl. Logic},
year = {2002},
volume = {118},
pages = {87--114},
number = {1-2},
coden = {APALD7},
doi = {10.1016/S0168-0072(01)00121-X},
fjournal = {Annals of Pure and Applied Logic},
issn = {0168-0072},
keywords = {bib,cca},
mrclass = {03F35 (03B30 03C25 03D80)},
mrnumber = {1933397 (2003g:03101)},
mrreviewer = {Reinhard Kahle},
owner = {Vasco},
timestamp = {2013.12.03},
url = {http://dx.doi.org/10.1016/S0168-0072(01)00121-X}
}