Uniformization, choice functions and well orders in the class of trees. Lifsches, S. & Shelah, S. Journal of Symbolic Logic, 61:1206-1227, 1996. arxiv:math/9404227
bibtex   
@article{LeSh:539,
author = {Lifsches, Shmuel and Shelah, Saharon},
fromwhere = {IL, IL},
journal = {Journal of Symbolic Logic},
note = { arxiv:math/9404227 },
pages = {1206-1227},
title = {{Uniformization, choice functions and well orders in the class
 of trees}},
volume = {61},
year = {1996},
}

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