@MISC{WELLSET1.MIZ,
  AUTHOR = {Nowak, Bogdan and Bia{\l}ecki, S{\l}awomir},
  TITLE = {Zermelo's Theorem},
  NOTE = {Supported by RPBP.III-24.C9.},
  DAY = {27},
  MONTH = {October},
  YEAR = {1989},
  ADDRESS1 = {{\L}\'od\'z University},
  ADDRESS2 = {{\L}\'od\'z University},
  SUMMARY = {   The article contains direct proof of Zermelo's theorem
about the existence of a well ordering for any set and the lemma
the proof depends on.}}

