@MISC{RINGCAT1.MIZ,
  AUTHOR = {Muzalewski, Micha{\l}},
  TITLE = {Category of Rings},
  DAY = {05},
  MONTH = {December},
  YEAR = {1991},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok},
  SUMMARY = {We define the category of non-associative rings.
 The carriers of the rings are included in a universum. The universum
 is a parameter of the category.}}

