@MISC{YELLOW_7.MIZ,
  AUTHOR = {Bancerek, Grzegorz},
  TITLE = {Duality in Relation Structures},
  NOTE = {This work has been partially supported by the Office of Naval Research
Grant N00014-95-1-1336.},
  DAY = {12},
  MONTH = {November},
  YEAR = {1996},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok}}

