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}

@misc{aaa, 
author={大田春外}, 
year={2011}, 
title={はじめよう {B}alogh's {D}owker {S}paces},
note={http://www12.plala.or.jp/echohta/top/DowkerSpaces.pdf}, 
}

@article{kojman2005pcf,
  title={Pcf theory},
  author={Kojman, Menachem},
  journal={arXiv preprint math/0501308},
  year={2005}
}

@article {MR2877530,
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      ISSN = {0146-4124,2331-1290},
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  MRNUMBER = {2877530},
MRREVIEWER = {Paul\ Bankston},
}

@incollection {MR1602479,
    AUTHOR = {Junqueira, L\'{u}cia R. and Tall, Franklin D.},
     TITLE = {The topology of elementary submodels},
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}