On Borel hull operations. Filipczak, T., Roslanowski, A., & Shelah, S. Real Analysis Exchange, 40:129-140, 2015. arxiv:1308.3749
bibtex   
@article{FRSh:1031,
author = {Filipczak, Tomasz and Roslanowski, Andrzej and Shelah,
 Saharon},
trueauthor = {Filipczak, Tomasz and Ros{\l}anowski, Andrzej and Shelah,
 Saharon},
fromwhere = {1,IL},
journal = {Real Analysis Exchange},
note = { arxiv:1308.3749 },
pages = {129-140},
title = {{On Borel hull operations}},
volume = {40},
year = {2015},
}

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