@MISC{MOD_3.MIZ,
  AUTHOR = {Muzalewski, Micha{\l}},
  TITLE = {Free Modules},
  DAY = {18},
  MONTH = {October},
  YEAR = {1991},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok},
  SUMMARY = { We define free modules and prove that every left module over
     Skew-Field is free.}}

